Modular energy storage converter device

Abstract

The utility model discloses a modular energy storage current conversion equipment, including current conversion equipment, energy storage equipment and ventilation pipeline, and current conversion equipment is equipped with heat dissipation channel and first heat dissipation fan, and heat dissipation channel is equipped with connecting port, and connecting port forms the air inlet end or air outlet end of heat dissipation channel, and the first heat dissipation fan is suitable for driving the air flow air inlet end to flow to the air outlet end, and energy storage equipment includes energy storage battery, and it is equipped with heat dissipation cavity, and the temperature of energy storage battery is suitable for being adjusted directly or indirectly by the temperature in heat dissipation cavity, and heat dissipation cavity is equipped with air inlet, and ventilation pipeline is placed between air inlet and connecting port to be suitable for when forming the air outlet end of heat dissipation channel in connecting port, is used for introducing the hot airflow of heat dissipation channel into heat dissipation cavity to heat energy storage battery. The present application can heat energy storage battery, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of energy storage, specifically to a modular energy storage converter. Background Technology

[0002] In modular energy storage converters that include energy storage devices and converters, the energy storage device has a battery compartment for housing the energy storage battery. In the prior art, the energy storage device and the converter are independent of each other. However, in practice, it has been found that when the temperature of the energy storage battery is low, it is difficult to start up the energy storage battery. Therefore, it is necessary to heat the energy storage battery, but the cost of heating the energy storage battery is relatively high. Utility Model Content

[0003] The purpose of this invention is to overcome the aforementioned defects or problems in the background technology and provide a modular energy storage converter that can heat energy storage batteries and is inexpensive.

[0004] To achieve the above objectives, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Technical Solution 1 and its related embodiments provide a modular energy storage converter, including an energy storage device comprising an energy storage battery having a heat dissipation cavity, the temperature of the energy storage battery being adapted to be directly or indirectly adjusted by the temperature within the heat dissipation cavity, the heat dissipation cavity having an air inlet; a converter having a heat dissipation channel and a first heat dissipation fan, the heat dissipation channel having a connection port forming an air inlet or outlet of the heat dissipation channel, the first heat dissipation fan being adapted to drive airflow from the air inlet to the air outlet; and a ventilation duct placed between the air inlet and the connection port to be adapted to introduce hot airflow from the heat dissipation channel into the heat dissipation cavity to heat the energy storage battery when the connection port forms the air outlet of the heat dissipation channel.

[0006] Based on technical solution one, technical solution two is also provided. In technical solution two and its related embodiments, the ventilation duct connects the air inlet and the connection port; the ventilation duct is adapted to switch between an open state and a closed state. In the open state, the heat dissipation channel is supplied with air or exhausts air by the ventilation duct, and the air inlet is supplied with air by the ventilation duct; in the closed state, the heat dissipation channel is exhausted by the ventilation duct, and the air inlet is supplied with air by the heat dissipation channel via the ventilation duct.

[0007] Based on technical solution two, technical solution three is also provided. In technical solution three and its related embodiments, the ventilation duct is provided with a first ventilation section near the air inlet and a second ventilation section near the connection port. The first ventilation section and the second ventilation section are respectively provided with a first air outlet and a second air outlet. The ventilation duct is also provided with a first opening and closing component and a second opening and closing component. In the open state, the first opening and closing component actively or passively opens the first air outlet, and the second opening and closing component actively or passively opens the second air outlet. The air inlet is supplied with air by the first air outlet, and the heat dissipation channel is supplied with air or exhaust air by the second air outlet. In the closed state, the first opening and closing component actively or passively closes the first air outlet, and the second opening and closing component actively or passively closes the second air outlet.

[0008] Based on technical solution three, technical solution four is also provided. In technical solution four and its related embodiments, a switching component is also included. The switching component is disposed in the ventilation duct. In the open state, the switching component moves actively or passively to a first position. In the first position, the first ventilation section and the second ventilation section are isolated from each other. In the closed state, the switching component moves actively or passively to a second position. In the second position, the first ventilation section and the second ventilation section are connected.

[0009] Based on technical solution four, there is also technical solution five. In technical solution five and its related embodiments, in the open state, the heat dissipation channel is exhausted by the second air vent; the first air vent is located below the second air vent.

[0010] Based on technical solution three, technical solution six is ​​also provided. In technical solution six and its related embodiments, the first cooling fan is adapted to switch the airflow direction in the cooling channel; in the open state, the connection port forms the air inlet of the cooling channel; in the closed state, the connection port forms the air outlet of the cooling channel.

[0011] Based on technical solution six, technical solution seven is also provided. In technical solution seven and its related embodiments, the number of the first air vent and the second air vent are both multiple; the first opening and closing component includes a first opening and closing door corresponding to each first air vent, and the second opening and closing component includes a second opening and closing door corresponding to the second air vent; both the first opening and closing door and the second opening and closing door are configured to rotate within the ventilation duct and the maximum opening angle when open is an acute angle, and the free end of the first opening and closing door is closer to the air inlet than its rotating end, and the free end of the second opening and closing door is closer to the connection port than its rotating end.

[0012] Based on technical solution two, technical solution eight is also provided. In technical solution eight and its related embodiments, the ventilation duct is provided with a first air outlet and a second air outlet that are opposite to each other. The first air outlet is located below the second air outlet. The ventilation duct is also provided with a first opening and closing member and a second opening and closing member that are opposite to each other. Both the first opening and closing member and the second opening and closing member are adapted to rotate actively or passively within the ventilation duct. In the open state, the free ends of the first opening and closing member and the second opening and closing member are abutted against each other so that the first air outlet and the second air outlet are not connected, and the heat dissipation channel is exhausted through the second air outlet. In the closed state, the free ends of the first opening and closing member and the second opening and closing member are moved away from each other and respectively close the first air outlet and the second air outlet.

[0013] Based on technical solution one, there is also technical solution nine. In technical solution nine and its related embodiments, the ventilation duct has a first port near the air inlet and a second port near the connection port. A gap is formed between the first port and the air inlet, and a gap is formed between the second port and the connection port. The connection port always forms the air outlet of the heat dissipation channel. An exhaust fan is provided in the ventilation duct, and the exhaust fan is adapted to drive the airflow from the second port to the first port.

[0014] Based on technical solution one, there is also technical solution ten. In technical solution ten and its related embodiments, the energy storage device is equipped with a liquid cooler for heating or cooling the energy storage battery. The liquid cooler exchanges heat through a heat exchanger, and the heat exchanger of the liquid cooler is placed inside the heat dissipation cavity.

[0015] As can be seen from the above description of the present invention and its preferred embodiments, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0016] In Technical Solution 1 and its preferred embodiments, the temperature of the energy storage battery is adapted to be directly or indirectly adjusted by the temperature within the heat dissipation cavity. Direct temperature adjustment within the heat dissipation cavity means the energy storage battery is placed inside the cavity, where temperature changes directly affect the battery's temperature. Indirect temperature adjustment means the battery is not located within the cavity, but the cavity's temperature can be transferred to the battery via airflow or other media, indirectly affecting its temperature. In this solution, a ventilation duct is placed between the air inlet and the connection port to facilitate the introduction of hot airflow from the heat dissipation channel into the heat dissipation cavity to heat the battery when the connection port forms the outlet of the heat dissipation channel. This means the ventilation duct only introduces hot airflow into the cavity when needed. This arrangement allows for the full utilization of the waste heat from the converter equipment for heating the battery. Compared to other heating methods, such as using a heater, this reduces costs and simplifies the structure.

[0017] In technical solution two and its preferred embodiments, the ventilation duct connects the connection port and the air inlet. Compared to a non-connected method, this is more conducive to ensuring all the heat from the heat dissipation channel flows into the air inlet, thereby fully utilizing the waste heat of the converter equipment. The ventilation duct is suitable for switching between an open and closed state. In the open state, the heat dissipation channel is supplied or exhausted by the ventilation duct, and the air inlet is supplied by the ventilation duct, meaning the converter equipment and energy storage equipment are cooled independently, and the energy storage battery needs to be cooled at this time. In the closed state, the heat dissipation channel is exhausted by the ventilation duct, and the air inlet is supplied by the heat dissipation channel via the ventilation duct. The waste heat from the time-varying power supply is used to heat the energy storage battery. This technical solution allows the ventilation duct to be switched, which requires less modification to the energy storage and power supply equipment compared to switching the state of the air inlet of the energy storage equipment (e.g., installing a three-way valve at the air inlet, which has a state of being connected to the ventilation duct and a state of not being connected) or switching the state of the connection port of the power supply equipment (e.g., installing a three-way valve at the connection port, which has a state of being connected to the ventilation duct and a state of not being connected). It is more conducive to application to the existing structure of power supply and energy storage equipment, and the modification cost is low.

[0018] In technical solution three and its preferred embodiments, the arrangement of the first air inlet, the second air inlet, the first opening and closing element, and the second opening and closing element is simple in structure and low in cost. It allows the ventilation duct to switch between open and closed states. When the converter and energy storage device are cooled independently, the air inlet is supplied with air by the first air inlet, and the heat dissipation channel is supplied with or exhausted by the second air inlet. This is more conducive to ensuring that the converter and energy storage device do not interfere with each other. Compared with setting a three-way valve at the air inlet and the connection port to directly introduce airflow from the outside, the air intake volume of the first air inlet and the second air inlet on the ventilation duct is larger than that of the three-way valve. The heat dissipation efficiency of the energy storage device and the converter is higher. It also makes the air outlet resistance of the converter low and the air outlet efficiency high when the heat dissipation channel exhausts air from the connection port, and the heating efficiency of the energy storage device is high.

[0019] In technical solution four and its preferred embodiments, when the ventilation duct is in the open state, the air inlet is supplied with air by the first air outlet, and the converter is supplied with air or exhausts air by the second air outlet. The switching component moves to the first position to isolate the first ventilation section and the second ventilation section from each other. Compared with the solution where the first ventilation section and the second ventilation section are not isolated, this avoids the problem that when the converter is supplied with air by the second air outlet, the air resistance in the ventilation duct is too high, the air volume at the air inlet and the connection port is small, and the heat dissipation efficiency of the converter and the energy storage device is poor. It also avoids the problem that when the converter exhausts air by the second air outlet, the hot air in the heat dissipation channel does not pass through the second air outlet and directly enters the first air outlet, which leads to a decrease in the heat dissipation efficiency of the energy storage device.

[0020] In technical solution five and its preferred embodiments, in the open state, the heat dissipation channel is exhausted through the second air vent, that is, the connection port always forms the air outlet of the heat dissipation channel. This requires almost no modification to the converter equipment and is more conducive to the direct application of existing converter equipment with low modification costs. The first air vent is located below the second air vent. Since the density of hot air is less than that of cold air, in the open state of the ventilation duct, the hot air exhausted from the second air vent is not easy to pass downward through the first air vent and enter the air inlet, thereby avoiding the problem of reduced heat dissipation efficiency of the energy storage equipment.

[0021] In technical solution six and its preferred embodiments, the first cooling fan is adapted to switch the airflow direction within the cooling channel. In the open state, the connection port forms the air inlet of the cooling channel; in the closed state, the connection port forms the air outlet of the cooling channel. Compared to the connection port also forming the air outlet of the cooling channel in the open state, this is more conducive to avoiding the problem of reduced heat dissipation efficiency of the energy storage device caused by hot air from the cooling channel entering the air inlet through the first air outlet. Therefore, in the open state, the connection port forming the air inlet of the cooling channel improves the heat dissipation efficiency of the energy storage device.

[0022] In technical solution seven and its preferred embodiments, both the first and second opening / closing doors are configured to rotate within the ventilation duct and have a maximum opening angle of acute angle. The free end of the first opening / closing door is closer to the first port than its rotating end, and the free end of the second opening / closing door is closer to the second port than its rotating end. This allows the first opening / closing door to form an inclined extension and guide airflow to the air inlet when it is open, and the second opening / closing door to form an inclined extension and guide airflow to the connecting port when it is open. This results in lower wind resistance and higher heat dissipation efficiency.

[0023] In technical solution eight and its preferred embodiment, in the open state, the free ends of the first and second opening / closing components are abutted against each other to prevent the first and second air inlets from connecting. The heat dissipation channel exhausts air through the second air inlet, avoiding excessive air resistance in the ventilation duct, low airflow at the inlet and connection port, and poor heat dissipation efficiency of the converter and energy storage equipment when the first and second air inlets are connected. In the closed state, the free ends of the first and second opening / closing components are separated from each other and respectively close the first and second air inlets. The arrangement of the first and second air inlets, the first and second opening / closing components, and the second opening / closing components is simple in structure and low in cost, allowing the ventilation duct to switch between open and closed states. The first air inlet is located below the second air inlet. Since the density of hot air is less than that of cold air, in the open state of the ventilation duct, the hot air exhausted from the second air inlet is less likely to flow downwards through the first air inlet into the inlet, thus avoiding the problem of reduced heat dissipation efficiency of the energy storage equipment.

[0024] In technical solution nine and its preferred embodiments, a gap is formed between the first port and the air inlet, and a gap is formed between the second port and the connecting port. The connecting port always forms the air outlet of the heat dissipation channel. An exhaust fan is provided in the ventilation duct. The exhaust fan is suitable for driving the airflow from the second port to the first port, so that the hot airflow of the converter can be introduced into the energy storage device to heat the energy storage battery when needed without any modification to the existing energy storage device and converter device. The modification cost is low.

[0025] In the tenth technical solution and its preferred embodiment, the energy storage device is equipped with a liquid cooler for heating or cooling the energy storage battery. The liquid cooler exchanges heat through a heat exchanger, which is placed inside the heat dissipation cavity. Compared with the direct transfer of hot airflow to the energy storage battery through the heat dissipation channel, the energy storage battery is heated indirectly through the heat exchanger of the liquid cooler, resulting in more uniform heating of the energy storage battery. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the ventilation duct of a single unit of the combined electrical equipment in Embodiment 1 of this utility model in the closed state;

[0028] Figure 2 This is a schematic diagram of the ventilation duct of a single unit of the combined electrical equipment in Embodiment 1 of this utility model in the open state;

[0029] Figure 3 This is a schematic diagram of the ventilation duct of a single unit of the combined electrical equipment in Embodiment 2 of this utility model in the closed state;

[0030] Figure 4 This is a schematic diagram of the ventilation duct of a single unit of the combined electrical equipment in Embodiment 2 of this utility model in the open state;

[0031] Figure 5 This is a schematic diagram of the ventilation duct of a single unit of the combined electrical equipment in Embodiment 3 of this utility model in the closed state;

[0032] Figure 6 This is a schematic diagram of the ventilation duct of a single unit of the combined electrical equipment in Embodiment 3 of this utility model in the open state;

[0033] Figure 7 This is a schematic diagram of a single unit of the combined electrical equipment according to Embodiment 4 of this utility model.

[0034] Explanation of key figure labels:

[0035] Energy storage device 10; battery compartment 11; heat dissipation cavity 12; air inlet 121; air outlet 122; liquid chiller 13; heat exchanger 131; second heat dissipation fan 132; converter 20; first heat dissipation fan 21; heat dissipation channel 22; connection port 221; ventilation opening 222; ventilation duct 30; first ventilation section 31; first air outlet 311; second ventilation section 32; second air outlet 321; first opening and closing component 33; first opening and closing door 331; second opening and closing component 34; second opening and closing door 341; switching component 35; first port 01; second port 02; exhaust fan 36; control module 40. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0037] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0038] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0039] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0040] Example 1

[0041] See Figure 1-2 , Figure 1-2 A modular energy storage converter is shown, including a converter 20, an energy storage device 10, a ventilation duct 30, and a control module 40. In this embodiment, the modular energy storage converter can be an electrical device composed of an energy storage container and an energy storage converter in an energy storage power station; in other embodiments, the modular energy storage converter can also be an industrial or commercial energy storage cabinet in which energy storage battery modules and string energy storage converters are installed in an electrical cabinet.

[0042] The energy storage device 10 is prior art. It includes an energy storage battery and a heat dissipation cavity 12. The temperature of the energy storage battery is adapted to be directly or indirectly regulated by the temperature within the heat dissipation cavity 12. Direct temperature regulation within the heat dissipation cavity 12 means the energy storage battery is placed inside the heat dissipation cavity 12; in this case, temperature changes within the heat dissipation cavity 12 directly affect the temperature of the energy storage battery. Indirect temperature regulation within the heat dissipation cavity 12 means the energy storage battery is not located inside the heat dissipation cavity 12, but the temperature of the heat dissipation cavity 12 can be transferred to the energy storage battery via airflow or other media. This indirectly leads to temperature changes in the energy storage battery. The heat dissipation cavity 12 is provided with an air inlet 121. Exemplarily, the energy storage device 10 includes a cabinet, an energy storage battery, and a liquid cooling unit. The liquid cooling unit includes a liquid cooler 13 and liquid cooling pipes. The cabinet is provided with a battery compartment 11 for accommodating the energy storage battery and a heat dissipation cavity 12 for accommodating the liquid cooler 13. The liquid cooling pipes are laid in the battery compartment 11 corresponding to each energy storage battery and extend into the heat dissipation cavity 12 to connect with the liquid cooler 13, so that the liquid cooler 13 can heat or cool the energy storage battery. The liquid cooler 13 exchanges heat through a heat exchanger 131. At this time, the temperature of the energy storage battery is suitable for indirect temperature adjustment within the heat dissipation cavity 12. In this embodiment, the heat dissipation cavity 12 is also provided with an air outlet 122, and the heat exchanger 131 is also provided with a second cooling fan 132 that drives the airflow from the air inlet 121 to the air outlet 122.

[0043] The power converter 20 is provided with a heat dissipation channel 22 and a first cooling fan 21. The heat dissipation channel 22 has a connection port 221, and the end of the heat dissipation channel 22 away from the connection port 221 has a vent 222 that communicates with the outside. The connection port 221 forms the air inlet or outlet of the heat dissipation channel 22. The first cooling fan 21 is adapted to drive the airflow from the air inlet to the air outlet, that is, the first cooling fan 21 can drive the airflow from the connection port 221 to the vent 222 or from the vent 222 to the connection port 221. In this embodiment, the first cooling fan 21 is adapted to switch the airflow direction within the heat dissipation channel 22. Exemplarily, the power converter 20 includes a relatively sealed protective cavity, and the power modules, capacitor buses, and other electrical components of the power converter 20 are placed in the protective cavity. When the electrical components inside the protective cavity are cooled by liquid cooling of the liquid chiller 13, the liquid chiller can be placed in the heat dissipation channel 22; when the electrical components inside the protective cavity are cooled by air cooling of the air heat exchanger, the heat dissipation channel 22 can be the external circulation air duct of the air heat exchanger.

[0044] A ventilation duct 30 is positioned between the air inlet 121 and the connection port 221 to facilitate the introduction of hot airflow from the heat dissipation channel 22 into the heat dissipation cavity 12 to heat the energy storage battery when the air outlet of the heat dissipation channel 22 is formed at the connection port 221. In this embodiment, the ventilation duct 30 connects the air inlet 121 and the connection port 221; the ventilation duct 30 is adapted to switch between an open state and a closed state. In the open state, the heat dissipation channel 22 is supplied with air by the ventilation duct 30, and the air inlet 121 is supplied with air by the ventilation duct 30; in the closed state, the heat dissipation channel 22 is exhausted by the ventilation duct 30, and the air inlet 121 is supplied with air by the heat dissipation channel 22 via the ventilation duct 30.

[0045] Specifically, the ventilation duct 30 is provided with a first ventilation section 31 near the air inlet 121 and a second ventilation section 32 near the connection port 221. The first ventilation section 31 and the second ventilation section 32 are respectively provided with a first air passage 311 and a second air passage 321, and there are multiple first air passages 311 and multiple second air passages 321. The ventilation duct 30 is also provided with a first opening and closing element 33 and a second opening and closing element 34. The first opening and closing element 33 includes a first opening and closing door 331 corresponding to each first air passage 311, and the second opening and closing element 34 includes a second opening and closing door 341 corresponding to the second air passage 321. In the open state, the first opening and closing element 33 actively or passively opens the first air passage 311, and the second opening and closing element 34 actively or passively opens the second air passage 321. Both the first opening and closing door 331 and the second opening and closing door 341 are configured to rotate within the ventilation duct 30, and the maximum opening angle when open is an acute angle. The free end of the first opening and closing door 331... Compared to its rotating end, which is closer to the air inlet 121, the free end of the second opening / closing door 341 is closer to the connection port 221. At this time, the air inlet 121 is supplied with air by the first air passage 311, and the second cooling fan 132 drives the airflow from the first air passage 311 through the air inlet 121 to the air outlet 122. The connection port 221 forms the air inlet of the heat dissipation channel 22, which is supplied with air by the second air passage 321 and driven by the first cooling fan 21. Airflow flows from the second air inlet 321 through the connection port 221 to the ventilation opening 222. In the closed state, the first opening / closing member 33 passively closes the first air inlet 311, and the second opening / closing member 34 passively closes the second air inlet 321. At this time, the connection port 221 forms the air outlet of the heat dissipation channel 22. The first cooling fan 21 drives the airflow from the ventilation opening 222 through the connection port 221 into the ventilation duct 30, and then into the air inlet 121 through the ventilation duct 30. Although this embodiment only shows the implementation where the opening / closing member passively opens or closes the air inlet, it is understood that the opening / closing member can also be controlled by the control module and actively open or close the air inlet after receiving instructions from the control module. The first cooling fan 21 can manually change the airflow direction via the operation panel of the converter device 20, or it can be switched by the control module 40 based on information from the external environment or the energy storage battery. The control module 40 can be the control module 40 for the energy storage device 10 and the converter device 20, which can control the operation of the energy storage device 10 and the converter device 20.

[0046] In this embodiment, the energy storage device 10 is equipped with a liquid cooler 13 for heating or cooling the energy storage battery. The liquid cooler 13 exchanges heat through a heat exchanger 131. The heat exchanger 131 of the liquid cooler 13 is placed inside the heat dissipation cavity 12. Compared with the direct transmission of hot airflow to the energy storage battery through the heat dissipation channel 22, the energy storage battery is indirectly heated by heating the heat exchanger 131 of the liquid cooler 13, resulting in more uniform heating of the energy storage battery.

[0047] In this embodiment, the ventilation duct 30 is placed between the air inlet 121 and the connection port 221 to be suitable for introducing the hot airflow of the heat dissipation channel 22 into the heat dissipation cavity 12 to heat the energy storage battery when the air outlet of the heat dissipation channel 22 is formed at the connection port 221. In this embodiment, it means that the ventilation duct 30 will only introduce the hot airflow of the heat dissipation channel 22 into the heat dissipation cavity 12 when needed. The above setting creates conditions for making full use of the waste heat of the converter 20 to heat the energy storage battery. Compared with other heating methods, such as setting a heater to heat the energy storage battery, the cost is reduced and the structure is simple.

[0048] In this embodiment, the ventilation duct 30 connects the air inlet 121 and the connection port 221. Compared to a non-connected configuration, this is more conducive to ensuring that all the heat from the heat dissipation channel 22 flows into the air inlet 121, thereby fully utilizing the waste heat of the converter device 20. The ventilation duct 30 is suitable for switching between an open state and a closed state. In the open state, the heat dissipation channel 22 is supplied with or exhausted by the ventilation duct 30, and the air inlet 121 is supplied with air by the ventilation duct 30. That is, the converter device 20 and the energy storage device 10 are cooled independently, and the energy storage battery needs to be cooled at this time. In the closed state, the heat dissipation channel 22 is exhausted by the ventilation duct 30, and the air inlet 121 is supplied with air from the heat dissipation channel 22 via the ventilation duct 30. The waste heat from the converter 20 is used to heat the energy storage battery. In this embodiment, by making the state of the ventilation duct 30 switchable, compared to making the state of the air inlet 121 of the energy storage device 10 switchable (e.g., by setting a three-way valve at the air inlet 121, which has a state of being connected to the ventilation duct 30 and a state of not being connected) or making the state of the connection port 221 of the converter 20 switchable (e.g., by setting a three-way valve at the connection port 221, which has a state of being connected to the ventilation duct 30 and a state of not being connected), the modifications to the energy storage device 10 and the converter 20 are smaller, which is more conducive to application to the existing structure of the converter 20 and the energy storage device 10, and the modification cost is low.

[0049] In this embodiment, the arrangement of the first air inlet 311, the second air inlet 321, the first opening and closing element 33, and the second opening and closing element 34 is simple in structure and low in cost. It allows the ventilation duct 30 to switch between open and closed states, and enables the air inlet 121 to be supplied with air by the first air inlet 311 when the power converter 20 and the energy storage device 10 are independently cooled, while the heat dissipation channel 22 is supplied with or exhausted by the second air inlet 321. This is more conducive to achieving independent cooling of the power converter 20 and the energy storage device 10. The interference is reduced, and compared to the air inlet 121 and the connection port 221, which are respectively equipped with a three-way valve to directly introduce airflow from the outside, the air intake volume of the first air outlet 311 and the second air outlet 321 on the ventilation duct 30 is larger than that of the three-way valve. The heat dissipation efficiency of the energy storage device 10 and the converter device 20 is higher. It also makes the air outlet resistance of the converter device 20 small and the air outlet efficiency high when the heat dissipation channel 22 exhausts air from the connection port 221, and the heating efficiency of the energy storage device 10 is high.

[0050] In this embodiment, the first cooling fan 21 is adapted to switch the airflow direction within the cooling channel 22. In the open state, the connection port 221 forms the air inlet of the cooling channel 22; in the closed state, the connection port 221 forms the air outlet of the cooling channel 22. Compared to the connection port 221 also forming the air outlet of the cooling channel 22 in the open state, this is more conducive to avoiding the problem of reduced heat dissipation efficiency of the energy storage device 10 caused by hot air from the cooling channel 22 entering the air inlet 121 through the first air outlet 311. Therefore, in the open state, the connection port 221 forming the air inlet of the cooling channel 22 improves the heat dissipation efficiency of the energy storage device 10.

[0051] In this embodiment, both the first opening / closing door 331 and the second opening / closing door 341 are configured to rotate within the ventilation duct 30 and have a maximum opening angle of acute angle. The free end of the first opening / closing door 331 is closer to the first port 01 than its rotating end, and the free end of the second opening / closing door 341 is closer to the second port 02 than its rotating end. This allows the first opening / closing door 331 to extend at an angle and guide the airflow to the air inlet 121 when it is open, and the second opening / closing door 341 to extend at an angle and guide the airflow to the air inlet 221 when it is open. This results in lower wind resistance and higher heat dissipation efficiency.

[0052] Example 2

[0053] Example 2 is basically the same as the scheme in Example 1, see [link / reference] Figure 3-4 The difference is that the first cooling fan 21 cannot switch the airflow direction of the cooling channel 22. Therefore, the connection port 221 always forms the air outlet of the cooling channel 22.

[0054] Furthermore, the structure of the ventilation duct 30 differs from that in Embodiment 1. In this embodiment, the ventilation duct 30 is provided with a first ventilation section 31 near the air inlet 121 and a second ventilation section 32 near the connection port 221. The first ventilation section 31 and the second ventilation section 32 are respectively provided with a first air passage 311 and a second air passage 321, which are respectively located near the two ends of the ventilation duct 30. The ventilation duct 30 is also provided with a first opening and closing element 33, a second opening and closing element 34, and a switching element 35. The switching element 35 is located inside the ventilation duct 30. In the open state, the first opening and closing element 33 actively or passively opens the first air passage 311. Air vent 311, second opening and closing member 34 actively or passively opens second air vent 321, air inlet 121 is supplied with air by first air vent 311, heat dissipation channel 22 is exhausted with air by second air vent 321, switching member 35 actively or passively moves to first position, in first position, first ventilation section 31 and second ventilation section 32 are isolated from each other; in closed state, first opening and closing member 33 actively or passively closes first air vent 311, second opening and closing member 34 actively or passively closes second air vent 321; switching member 35 actively or passively moves to second position, in second position, first ventilation section 31 and second ventilation section 32 are connected. In this embodiment, the second air vent 321 is located below the first air vent 311. The first opening / closing member 33 and the second opening / closing member 34 are configured to rotate outside the ventilation duct 30, and the maximum opening angle when open is an obtuse angle. When the first opening / closing member 33 is closed, its free end is closer to the air inlet 121 than its rotating end. When the second opening / closing member 34 is closed, its free end is closer to the connection port 221 than its rotating end. In this embodiment, the switching member 35 consists of two rotating plates that rotate in opposite directions. In the first position, the free ends of the two rotating plates are in contact with each other. In the second position, the free ends of the two rotating plates are separated from each other and in contact with the inner wall of the ventilation duct 30. In this embodiment, the first opening / closing member 33, the second opening / closing member 34, and the switching member 35 are all in the form of electrically operated rotating doors driven by the control module 40.

[0055] In this embodiment, when the ventilation duct 30 is in the open state, the air inlet 121 is supplied with air by the first air outlet 311, and the power converter 20 is exhausted through the second air outlet 321. The switching component 35 moves to the first position so that the first ventilation section 31 and the second ventilation section 32 are isolated from each other. Compared with the scheme where the first ventilation section 31 and the second ventilation section 32 are not isolated, this avoids the problem that when the power converter 20 is exhausted through the second air outlet 321, the hot air from the heat dissipation channel 22 directly enters the first air outlet 311 without passing through the second air outlet 321, which leads to a decrease in the heat dissipation efficiency of the energy storage device 10.

[0056] In this embodiment, when the device is open, the heat dissipation channel 22 is exhausted through the second air vent 321. That is, the connection port 221 always forms the air outlet of the heat dissipation channel 22. This requires no modification to the converter device 20 and is more conducive to the direct application of the existing converter device 20 with low modification cost. The first air vent 311 is located below the second air vent 321. Since the density of hot air is less than that of cold air, when the ventilation duct 30 is open, the hot air exhausted from the second air vent 321 is not easy to pass downward through the first air vent 311 and enter the air inlet 121, thereby avoiding the problem of reduced heat dissipation efficiency of the energy storage device 10.

[0057] The first opening / closing element 33 and the second opening / closing element 34 are configured to rotate outside the ventilation duct 30 and have a maximum opening angle of obtuse angle when open. When the first opening / closing element 33 is closed, its free end is closer to the air inlet 121 than its rotating end. When the second opening / closing element 34 is closed, its free end is closer to the connection port 221 than its rotating end. This allows the second opening / closing element 34 to guide the hot air discharged from the second air outlet 321 away from the converter device 20 when the ventilation duct 30 is open. The cold air introduced by the first air outlet 311 also comes from an area away from the second air outlet 321. This is more conducive to preventing the hot air discharged from the second air outlet 321 from entering the air inlet 121 through the first air outlet 311 when the ventilation duct 30 is open, thus avoiding the problem of reduced heat dissipation efficiency of the energy storage device 10.

[0058] Example 3

[0059] Example 3 is basically the same as Example 2, except that, see [link to example]. Figure 5-6 The ventilation duct 30 in Embodiment 3 has a different structure. The ventilation duct 30 is provided with a first air outlet 311 and a second air outlet 321 facing each other. The ventilation duct 30 also has a first opening / closing member 33 and a second opening / closing member 34 facing each other. Both the first opening / closing member 33 and the second opening / closing member 34 are adapted to rotate actively or passively within the ventilation duct 30. In the open state, the free ends of the first opening / closing member 33 and the second opening / closing member 34 are abutted against each other so that the first air outlet 311 and the second air outlet 321 are not connected, and the heat dissipation channel 22 is exhausted through the second air outlet 321. In the closed state, the free ends of the first opening / closing member 33 and the second opening / closing member 34 are moved away from each other and respectively close the first air outlet 311 and the second air outlet 321. In this embodiment, the second air outlet 321 is located below the first air outlet 311. In this embodiment, both the first opening / closing member 33 and the second opening / closing member 34 are in the form of electrically operated rotating doors driven by the control module 40. For example, when the first opening and closing member 33 and the second opening and closing member 34 are closed, the distance between the free end of the first opening and closing member 33 and the free end of the second opening and closing member 34 is greater than the distance between the rotating end of the first opening and closing member 33 and the rotating end of the second opening and closing member 34.

[0060] In this embodiment, in the open state, the free ends of the first opening and closing member 33 and the second opening and closing member 34 are abutted against each other so that the first air outlet 311 and the second air outlet 321 are not connected. The heat dissipation channel 22 is exhausted by the second air outlet 321, which avoids excessive wind resistance in the ventilation duct 30 when the first air outlet 311 and the second air outlet 321 are connected, resulting in small air intake at the air inlet 121 and the connection port 221, and poor heat dissipation efficiency of the converter device 20 and the energy storage device 10. In the closed state, the free ends of the first opening and closing member 33 and the second opening and closing member 34 are far apart from each other and close the first air outlet 311 and the second air outlet respectively. The arrangement of the first air outlet 311, the second air outlet 321, the first opening and closing member 33 and the second opening and closing member 34 is simple in structure and low in cost, which allows the ventilation duct 30 to switch between the open state and the closed state.

[0061] The first air vent 311 is located below the second air vent 321. Since the density of hot air is less than that of cold air, when the ventilation duct 30 is open, the hot air discharged from the second air vent 321 is not easy to enter the air inlet 121 through the downward first air vent 311, thereby avoiding the problem of reduced heat dissipation efficiency of the energy storage device 10.

[0062] Example 4

[0063] Example 4 differs from Example 1. In Example 4, see [link to example]. Figure 7 The ventilation duct 30 is provided with a first port 01 near the air inlet 121 and a second port 02 near the connection port 221. A gap is formed between the first port 01 and the air inlet 121, and a gap is formed between the second port 02 and the connection port 221. The connection port 221 always forms the air outlet of the heat dissipation channel 22. An exhaust fan 36 is provided inside the ventilation duct 30. The exhaust fan 36 is adapted to drive the airflow from the second port 02 to the first port 01.

[0064] In this embodiment, a gap is formed between the first port 01 and the air inlet 121, and a gap is formed between the second port 02 and the connection port 221. The connection port 221 always forms the air outlet of the heat dissipation channel 22. An exhaust fan 36 is provided in the ventilation duct 30. The exhaust fan 36 is adapted to drive the airflow from the second port 02 to the first port 01, so that the heat of the converter 20 can be introduced into the energy storage device 10 to heat the energy storage battery when needed without any modification to the existing energy storage device 10 and converter 20.

[0065] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A modular energy storage converter, characterized in that, include An energy storage device (10) includes an energy storage battery and a heat dissipation cavity (12) provided therein. The temperature of the energy storage battery is adapted to be directly or indirectly adjusted by the temperature inside the heat dissipation cavity (12). The heat dissipation cavity (12) is provided with an air inlet (121). A converter (20) is provided with a heat dissipation channel (22) and a first heat dissipation fan (21). The heat dissipation channel (22) is provided with a connection port (221), which forms the air inlet or outlet of the heat dissipation channel (22). The first heat dissipation fan (21) is adapted to drive airflow from the air inlet to the air outlet. A ventilation duct (30) is placed between an air inlet (121) and a connection port (221) to be adapted to introduce hot airflow from the heat dissipation channel (22) into the heat dissipation cavity (12) to heat the energy storage battery when the air outlet of the heat dissipation channel (22) is formed at the connection port (221).

2. The modular energy storage converter as described in claim 1, characterized in that, The ventilation duct (30) connects the air inlet (121) and the connection port (221); the ventilation duct (30) is adapted to switch between an open state and a closed state. In the open state, the heat dissipation channel (22) is supplied with air or exhausts air by the ventilation duct (30), and the air inlet (121) is supplied with air by the ventilation duct (30); in the closed state, the heat dissipation channel (22) is exhausted by the ventilation duct (30), and the air inlet (121) is supplied with air by the heat dissipation channel (22) via the ventilation duct (30).

3. The modular energy storage converter as described in claim 2, characterized in that, The ventilation duct (30) is provided with a first ventilation section (31) near the air inlet (121) and a second ventilation section (32) near the connection port (221). The first ventilation section (31) and the second ventilation section (32) are respectively provided with a first air outlet (311) and a second air outlet (321). The ventilation duct (30) is also provided with a first opening and closing element (33) and a second opening and closing element (34). In the open state, the first opening and closing element (33) actively or passively opens the first ventilation section (311) and the second ventilation section (321). In the first air vent (311), the second opening and closing member (34) actively or passively opens the second air vent (321), the air inlet (121) is supplied with air by the first air vent (311), and the heat dissipation channel (22) is supplied with air or exhaust air by the second air vent (321); in the closed state, the first opening and closing member (33) actively or passively closes the first air vent (311), and the second opening and closing member (34) actively or passively closes the second air vent (321).

4. A modular energy storage converter as described in claim 3, characterized in that, It also includes a switching element (35), which is disposed in the ventilation duct (30); in the open state, the switching element (35) moves actively or passively to a first position, in which the first ventilation section (31) and the second ventilation section (32) are isolated from each other; in the closed state, the switching element (35) moves actively or passively to a second position, in which the first ventilation section (31) and the second ventilation section (32) are connected.

5. A modular energy storage converter as described in claim 4, characterized in that, in In the open state, the heat dissipation channel (22) is vented by the second air vent (321); the first air vent (311) is located below the second air vent (321).

6. A modular energy storage converter as described in claim 3, characterized in that, The first cooling fan (21) is adapted to switch the airflow direction in the cooling channel (22); in the open state, the connection port (221) forms the air inlet of the cooling channel (22); in the closed state, the connection port (221) forms the air outlet of the cooling channel (22).

7. A modular energy storage converter as described in claim 6, characterized in that, There are multiple first air vents (311) and second air vents (321); the first opening and closing member (33) includes a first opening and closing door (331) corresponding to each first air vent (311), and the second opening and closing member (34) includes a second opening and closing door (341) corresponding to the second air vent (321); the first opening and closing door (331) and the second opening and closing door (341) are both configured to rotate within the ventilation duct (30) and the maximum opening angle when open is an acute angle, and the free end of the first opening and closing door (331) is closer to the air inlet (121) than its rotating end, and the free end of the second opening and closing door (341) is closer to the connection port (221) than its rotating end.

8. A modular energy storage converter as described in claim 2, characterized in that, The ventilation duct (30) is provided with a first air inlet (311) and a second air inlet (321) opposite to each other. The first air inlet (311) is located below the second air inlet (321). The ventilation duct (30) is also provided with a first opening and closing member (33) and a second opening and closing member (34) opposite to each other. Both the first opening and closing member (33) and the second opening and closing member (34) are adapted to rotate actively or passively within the ventilation duct (30). In the open state, the free ends of the first opening and closing member (33) and the second opening and closing member (34) are abutted against each other so that the first air inlet (311) and the second air inlet (321) are not connected. The heat dissipation channel (22) is exhausted through the second air inlet (321). In the closed state, the free ends of the first opening and closing member (33) and the second opening and closing member (34) are far apart from each other and respectively close the first air vent (311) and the second air vent (321).

9. A modular energy storage converter as described in claim 1, characterized in that, The ventilation duct (30) is provided with a first port (01) near the air inlet (121) and a second port (02) near the connection port (221). A gap is formed between the first port (01) and the air inlet (121), and a gap is formed between the second port (02) and the connection port (221). The connection port (221) always forms the air outlet of the heat dissipation channel (22). An exhaust fan (36) is provided in the ventilation duct (30), and the exhaust fan (36) is adapted to drive the airflow from the second port (02) to the first port (01).

10. A modular energy storage converter as described in claim 1, characterized in that, The energy storage device (10) is equipped with a liquid cooler (13) for heating or cooling the energy storage battery. The liquid cooler (13) exchanges heat through a heat exchanger (131), which is located inside the heat dissipation cavity (12).

Images