CN220774499U

CN220774499U - Energy storage system

Info

Publication number: CN220774499U
Application number: CN202322413048.2U
Authority: CN
Inventors: 周英杰; 刘晓军; 鞠梦贤
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2023-09-05
Filing date: 2023-09-05
Publication date: 2024-04-12
Anticipated expiration: 2033-09-05

Abstract

The utility model discloses an energy storage system, comprising: the shell, the energy storage device positioned in the shell and the refrigerating device; wherein, an air duct is arranged in the shell, the inlet of the air duct is communicated with the air supply outlet of the refrigerating device, and the outlet of the air duct is communicated with the air return inlet of the refrigerating device; the energy storage device comprises a battery pack, the battery pack is provided with a first heat dissipation channel and a second heat dissipation channel, the first heat dissipation channel extends to the head end of the battery pack along the tail end of the battery pack, the second heat dissipation channel extends to the head end of the battery pack from the side face of the battery pack, and the first heat dissipation channel and the second heat dissipation channel are both connected in series in the air duct. According to the energy storage system, cold air enters the battery pack from the tail end and the side face of the battery pack, and hot air is discharged from the head end of the battery pack to radiate the battery pack, so that the radiating effect is improved, the temperature difference between the battery cells inside the battery pack is reduced, and the temperature equalizing effect of the energy storage system is effectively improved.

Description

Energy storage system

Technical Field

The utility model relates to the technical field of heat dissipation of energy storage systems, in particular to an energy storage system.

Background

At present, an energy storage system radiates heat in an air cooling mode, wherein an air duct is arranged in the energy storage system, and a battery pack is positioned in the air duct.

In the above energy storage system, a refrigeration device is generally used to provide cold air, and the cold air flows through a battery pack in the air duct to become hot air and flows back to the refrigeration device to form an airflow circulation. However, there is a temperature difference between the cells in the battery pack, and the temperature equalizing effect of the energy storage system is poor.

In addition, a fan is arranged in the air duct. However, fans increase the heat dissipation cost of the energy storage system. Moreover, when the fan fails, the temperature difference at different positions in the energy storage system can be rapidly increased, resulting in poor reliability and stability of the energy storage system.

In summary, how to design heat dissipation of the energy storage system to improve the temperature equalizing effect of the energy storage system is a problem to be solved by those skilled in the art.

Disclosure of Invention

Accordingly, the present utility model is directed to an energy storage system to improve the temperature uniformity of the energy storage system.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

an energy storage system, comprising: a housing, an energy storage device within the housing, and a refrigeration device;

an air duct is arranged in the shell, an inlet of the air duct is communicated with an air supply outlet of the refrigerating device, and an outlet of the air duct is communicated with an air return inlet of the refrigerating device;

the energy storage device comprises a battery pack, the battery pack is provided with a first heat dissipation channel and a second heat dissipation channel, the first heat dissipation channel extends from the tail end of the battery pack to the head end of the battery pack, the second heat dissipation channel extends from the side face of the battery pack to the head end of the battery pack, and the first heat dissipation channel and the second heat dissipation channel are both connected in series in the air duct.

Optionally, the first heat dissipation channel and the second heat dissipation channel are communicated inside the battery pack;

and/or the tail end face of the battery pack is provided with a first ventilation opening, the side face of the battery pack is provided with a second ventilation opening, the head end face of the battery pack is provided with a third ventilation opening, the first ventilation opening is communicated with the third ventilation opening to form the first heat dissipation channel, and the second ventilation opening is communicated with the third ventilation opening to form the second heat dissipation channel.

Optionally, the first ventilation opening and the third ventilation opening are all one, the second ventilation openings are a plurality of, and the sum of the ventilation areas of all the second ventilation openings is greater than the ventilation area of the first ventilation opening and greater than the ventilation area of the third ventilation opening.

Optionally, the air duct comprises a first middle air duct, a second middle air duct and a return air duct, wherein inlets of the first middle air duct and the second middle air duct are communicated with an air supply port of the refrigerating device, and an outlet of the return air duct is communicated with a return air port of the refrigerating device;

the air return air duct is distributed at the head end of the battery pack, the first middle air duct is distributed at the tail end of the battery pack and communicated with the air return air duct through the first heat dissipation channel, the second middle air duct is distributed at the side face of the battery pack and communicated with the air return air duct through the second heat dissipation channel.

Optionally, the air duct further comprises an air supply duct, wherein the air supply duct is communicated with the air supply port and the first middle air duct, and the air supply duct is communicated with the air supply port and the second middle air duct;

the first middle air duct and the second middle air duct are arranged along the height direction of the energy storage device, and the air supply air duct is positioned at the top of the energy storage device.

Optionally, in the X direction, the battery packs are in at least two rows, each row of battery packs has the first middle air duct and the second middle air duct corresponding to the battery packs, and the X direction is perpendicular to the height direction of the energy storage device.

Optionally, in the X direction, an air supply duct inlet of the air supply duct is located in the middle of the air supply duct, the battery packs are uniformly distributed on two sides of the air supply duct inlet, and the second middle duct is located between the first middle duct and the air supply duct inlet.

Optionally, a cold air distribution device is arranged in the air supply duct, and the cold air distribution device is used for distributing cold air in the air supply duct to the air duct corresponding to each row of battery packs.

Optionally, the cold air distribution device includes a first ventilation board, the first ventilation board sets up the wind channel in the middle of the first with between the wind supply channel import, the middle part of first ventilation board with the wind supply channel import is relative, first ventilation board extends to keeping away from its both ends to middle part the direction of wind supply channel import.

Optionally, the battery packs positioned on the same side of the inlet of the air supply duct are at least two rows;

the cold air distribution device further comprises second ventilation plates, and the second ventilation plates are arranged at the upstream of at least two second middle air channels positioned on the same side of the inlet of the air supply air channel; in the two adjacent second ventilation plates positioned on the same side of the inlet of the air supply duct, in the direction of cold air flowing through the second ventilation plates, the aperture ratio of the second ventilation plates positioned at the upstream is smaller than that of the second ventilation plates positioned at the downstream;

the second ventilation plate is in sealing connection with the end part of the first ventilation plate.

Optionally, at least one of the second ventilation plates spans across the first inlet of the first intermediate duct.

Optionally, the middle part of the first ventilation board to the end part of the first ventilation board spans across the second inlet of at least one second middle air duct;

and/or, the first ventilation board comprises two crossed and connected ventilation sub-boards, and an included angle between the two ventilation sub-boards is an obtuse angle.

Optionally, the battery packs are arranged in two rows, and the tail end of one row of the battery packs is opposite to the tail end of the other row of the battery packs; the refrigerating device corresponds to each row of battery packs one by one, and the air duct corresponds to each row of battery packs one by one;

and/or at least two energy storage devices are provided, and each energy storage device is provided with the refrigeration device and the air duct corresponding to the energy storage device.

Optionally, the air supply outlet is located at the top end of the refrigerating device, the air return inlet is arranged on the side surface of the refrigerating device, the battery pack and the air return inlet are located at the same side of the refrigerating device, and the refrigerating device is located at the head end of the battery pack.

The heat dissipation principle of the energy storage system provided by the utility model is as follows:

an air duct is arranged in the shell of the energy storage system and is communicated with an air supply port and an air return port of the refrigerating device, so that the circulating flow of air flow is realized; the first heat dissipation channel and the second heat dissipation channel of the battery pack are connected in series in the air channel, cold air in the air channel can flow through the first heat dissipation channel and the second heat dissipation channel, and the cold air becomes hot air after flowing through the first heat dissipation channel and the second heat dissipation channel, so that the battery pack is cooled, and the hot air flows back to the refrigerating device through the air channel.

In the above energy storage system, since the first heat dissipation channel extends from the tail end of the battery pack to the head end of the battery pack, the cold air is enabled to flow from the tail end of the battery pack to the head end of the battery pack; since the second heat dissipation channel extends from the side surface of the battery pack to the head end of the battery pack, cold air is enabled to flow from the side surface of the battery pack to the head end of the battery pack. Therefore, the energy storage system realizes that cold air enters the battery pack from the tail end and the side surface of the battery pack and hot air is discharged from the head end of the battery pack to radiate the battery pack, so that the radiating effect is improved, the temperature difference between the battery cells inside the battery pack is reduced, and the temperature equalizing effect of the energy storage system is effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an energy storage system according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an embodiment of an energy storage system according to the present utility model with a container removed;

FIG. 3 is a top view of the structure shown in FIG. 2;

FIG. 4 is a front view of the structure shown in FIG. 2;

FIG. 5 is a cross-sectional view taken along A-A of FIG. 4;

fig. 6 is a schematic structural diagram of a battery pack in the energy storage system according to the embodiment of the present utility model;

fig. 7 is a rear view of a battery pack in an energy storage system according to an embodiment of the present utility model;

fig. 8 is a left side view of a battery pack in an energy storage system according to an embodiment of the present utility model.

In fig. 1-8:

1 is a shell, 2 is a refrigerating device, 3 is a first ventilation board, 4 is a second ventilation board, 5 is a sealing board, 6 is a coaming, 7 is a battery rack, and 8 is a battery pack;

21 is an air supply port, 22 is an air return port, 81 is a first air vent, 82 is a second air vent, 83 is a third air vent, 84 is a tail end face, 85 is a side face, and 86 is a head end face;

01 is an air supply duct, 02 is a first intermediate duct, 03 is a second intermediate duct, and 04 is a return air duct; 011 is the supply air duct inlet, 021 is the first inlet, 031 is the second inlet.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in embodiments of the present application, "one or more" means one, two, or more than two; "and/or", describes an association relationship of the association object, indicating that three relationships may exist; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The plurality of the embodiments of the present application refers to greater than or equal to two. It should be noted that, in the description of the embodiments of the present application, the terms "first," "second," and the like are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance, or alternatively, for indicating or implying a sequential order.

"parallel" and "perpendicular" as referred to in this application are "substantially parallel" and "substantially perpendicular" in actual operation. "substantially parallel" may be understood as parallel with some error and similarly "substantially perpendicular" may be understood as perpendicular with some error.

As shown in fig. 1 to 5, an energy storage system provided in an embodiment of the present utility model includes: a housing 1, an energy storage device (not shown) located within the housing 1, and a refrigeration device 2.

In fig. 1, the top cover of the housing 1 is removed to show the internal structure of the housing 1.

The above-mentioned refrigerating apparatus 2 is a device capable of generating cold air, for example, the refrigerating apparatus 2 is an air conditioner or other devices, and the embodiment of the present utility model is not limited thereto. In some embodiments, the refrigeration unit 2 may be a wall-mounted air conditioner that is provided on the housing 1 and/or the energy storage device.

The refrigerating device 2 has an air supply port 21 and an air return port 22, and cool air generated by the refrigerating device 2 is supplied through the air supply port 21 and the warm air flows back to the refrigerating device 2 through the air return port 22.

The housing 1 may be a container or other type of housing, which is not limited in this embodiment of the present utility model. In the case where the housing 1 is a container, the refrigerating device 2 may alternatively be provided on a door panel of the container.

An air duct (not shown) is arranged in the shell, an inlet of the air duct is communicated with an air supply outlet 21 of the refrigerating device 2, and an outlet of the air duct is communicated with an air return outlet 22 of the refrigerating device 2. In this way, the cold air generated by the refrigerating device 2 enters the air duct through the air supply opening 21, and becomes hot air after flowing through the air duct, and the hot air enters the refrigerating device 2 through the air return opening 22, so that the refrigerating device 2 can convert the hot air into the cold air and discharge the cold air through the air supply opening 21, and the circulating flow of the air flow is realized.

The energy storage device comprises a battery frame 7 and a battery pack 8 positioned on the battery frame 7. As shown in fig. 6 to 8, the battery pack 8 has a rectangular parallelepiped shape, and in the longitudinal direction of the battery pack 8, one end of the battery pack 8 is a leading end and an end face of the end is a trailing end face 84, and the other end of the battery pack 8 is a trailing end and an end face of the end is a leading end face 86; in the width direction of the battery pack 8, both side surfaces of the battery pack 8 are side surfaces 85; in the height direction of the battery pack 8, the top surface of the battery pack 8 is the top surface 87, and the bottom surface of the battery pack 8 is the ground (not shown). Of course, the battery pack 8 may have other shapes, and is not limited to the structure shown in fig. 6 to 8.

In the energy storage device, the number of the battery packs 8 may be one or two or more. In some embodiments, the number of the battery packs 8 is plural, at least two battery packs 8 are sequentially distributed along the height direction of the battery packs 8 to form a battery pack row, at least two battery packs 8 are sequentially distributed along the width direction of the battery packs 8 to form a battery pack row, and the specific number of the battery pack row and the battery pack row is selected according to the actual situation, which is not limited in the embodiment of the present utility model.

In other embodiments, it is possible to select the battery packs 8 to be distributed only along the column, i.e., any two battery packs 8 are sequentially distributed along the height direction of the battery packs 8 to form a battery pack column; alternatively, the battery packs 8 are distributed only in rows, that is, any two battery packs 8 are sequentially distributed in the width direction of the battery packs 8 to form a battery pack row.

The structure of the battery frame 7 may be designed according to the shape, number and distribution of the battery packs 8, which is not limited in the embodiment of the present utility model.

The battery pack 8 has a first heat dissipation channel and a second heat dissipation channel, the first heat dissipation channel extends to the head end of the battery pack along the tail end of the battery pack 8, the second heat dissipation channel extends to the head end of the battery pack 8 from the side surface of the battery pack 8, and the first heat dissipation channel and the second heat dissipation channel are both connected in series in the air duct.

In the above energy storage system, the battery pack 8 has a battery cell, so that in order to improve the temperature equalizing effect, the first heat dissipation channel may be selected to include a first gap between two adjacent battery cells, and the second heat dissipation channel may be selected to include a second gap between two adjacent battery cells. The length direction of the first gap is the length direction of the battery pack 8, and the length direction of the second gap is the width direction of the battery pack 8.

The first heat dissipation path and the second heat dissipation path may or may not communicate with each other inside the battery pack 8. In order to improve the uniformity effect, the above-described first heat dissipation path and second heat dissipation path may be selected to communicate inside the battery pack 8.

In some embodiments, in order to facilitate forming the first heat dissipation channel and the second heat dissipation channel, as shown in fig. 6 to 8, the tail end face 84 of the battery pack 8 is provided with a first ventilation opening 81, the side face 85 of the battery pack 8 is provided with a second ventilation opening 82, the head end face 86 of the battery pack 8 is provided with a third ventilation opening 83, the first ventilation opening 81 and the third ventilation opening 83 are communicated to form the first heat dissipation channel, and the second ventilation opening 82 and the third ventilation opening 83 are communicated to form the second heat dissipation channel.

The first vent 81 and the third vent 83 are opposed to each other.

Since the areas of the leading end face 86 and the trailing end face 84 of the battery pack 8 are small and the air flow is facilitated, one of the first ventilation opening 81 and the third ventilation opening 83 can be selected. To facilitate the air flow discharge, the central axis of the first ventilation opening 81 and the central axis of the third ventilation opening 83 may be selected to be arranged in line. Of course, the central axis of the first ventilation opening 81 and the central axis of the third ventilation opening 83 may be alternatively arranged in parallel, which is not limited in the embodiment of the present utility model.

The sizes of the first ventilation opening 81 and the third ventilation opening 83 are selected according to the actual situation. In order to improve the heat dissipation efficiency, the first ventilation opening 81 and the third ventilation opening 83 are designed to be as large as possible.

The shapes of the first ventilation opening 81 and the third ventilation opening 83 may be the same or different, and may be selected according to actual conditions.

The shapes of the first ventilation opening 81 and the third ventilation opening 83 are selected according to the actual situation, for example, the first ventilation opening 81 is rectangular, circular, elliptical, or the like, and the third ventilation opening 83 is rectangular, circular, elliptical, or the like, which is not limited in the embodiment of the present utility model.

Since the area of the side surface 85 of the battery pack 8 is large, a plurality of second ventilation openings 82 may be selected. Thus, the strength of the battery pack 8 is ensured, the heat dissipation area is increased, and the heat dissipation effect and the heat dissipation efficiency are improved.

The plurality of second air openings 82 may be distributed in an array, for example, the plurality of second air openings 82 are distributed in a plurality of rows and columns, which is not limited in the present utility model. It should be noted that a plurality in this document is two or more.

The specific number and specific shape of the second ventilation openings 82 are selected according to the actual situation, and the embodiment of the present utility model is not limited thereto.

In the battery pack 8, the second ventilation openings 82 may be distributed on one side surface 85 of the battery pack 8, or may be distributed on two side surfaces 85 of the battery pack 8, and the two side surfaces 85 may be distributed opposite to each other.

In the above-described battery pack 8, since the side faces 85 are larger than the trailing end face 86 and the leading end face 84, the sum of the ventilation areas of all the second ventilation openings 82 can be selected to be larger than the ventilation area of the first ventilation opening 81 and larger than the ventilation area of the third ventilation opening 83. Thus, the heat dissipation area is increased, and the heat dissipation effect and the heat dissipation efficiency are improved.

In the above-described structure, it may be selected that the ventilation area of the first ventilation opening 81 and the ventilation area of the third ventilation opening 83 are both larger than the ventilation area of each of the second ventilation openings 82.

In other embodiments, the first vent 81 and the second vent 82 may also be disposed on the top surface 87 of the battery pack 8 or at other locations, which is not limited in this embodiment of the utility model.

The heat dissipation principle of the energy storage system provided by the above embodiment is as follows:

an air duct is arranged in the shell 1 of the energy storage system, and is communicated with an air supply port 21 and an air return port 22 of the refrigerating device 2, so that the circulating flow of air flow is realized; the first heat dissipation channel and the second heat dissipation channel of the battery pack 8 are both connected in series in the air duct, cold air in the air duct can flow through the first heat dissipation channel and the second heat dissipation channel, and the cold air becomes hot air after flowing through the first heat dissipation channel and the second heat dissipation channel, so that the battery pack 8 is cooled, and the hot air flows back to the refrigerating device 2 through the air duct.

In the above energy storage system, since the first heat dissipation channel extends from the tail end of the battery pack 8 to the head end of the battery pack 8, the cold air is enabled to flow from the tail end of the battery pack 8 to the head end of the battery pack 8; since the second heat dissipation path extends from the side of the battery pack 8 to the head end of the battery pack 8, cold air is enabled to flow from the side of the battery pack 8 to the head end of the battery pack 8. Therefore, the energy storage system realizes that cold air enters the battery pack 8 from the tail end and the side surface of the battery pack 8 and hot air is discharged from the head end of the battery pack 8 to radiate the battery pack 8, so that the radiating effect is improved, the temperature difference between the electric cores inside the battery pack 8 is reduced, and the temperature equalizing effect of the energy storage system is effectively improved.

As previously described, the above-described energy storage system enables a circulating flow of air. Therefore, the circulating flow of the air flow can be realized by the driving force of the air return sent by the refrigerating device 2, namely, the circulating flow of the air flow can be realized without a fan, the fan is saved, and the heat dissipation cost of the energy storage system is reduced; in addition, heat dissipation failure of the energy storage system caused by failure of the fan is avoided, and reliability and stability of the energy storage system are improved. Therefore, the energy storage system ensures the temperature equalizing effect of the energy storage system under the condition of saving fans.

In the above energy storage system, the specific structure of the air duct is selected according to the actual situation. As shown in fig. 1 and 2, in some embodiments, the air duct includes a first intermediate air duct 02, a second intermediate air duct 03, and a return air duct 04, where the inlets of the first intermediate air duct 02 and the second intermediate air duct 03 are each in communication with an air supply 21 of the refrigeration device 2, and the outlet of the return air duct 04 is in communication with an air return 22 of the refrigeration device 2.

In order to facilitate return air, the return air duct 04 is distributed at the head end of the battery pack 8. In this case, in order to shorten the airflow path, the refrigeration device 2 may be selected to be close to the head end of the battery pack 8. Of course, the return air duct 04 may be alternatively disposed at another location, which is not limited in this embodiment.

To shorten the path, it may also be implemented in other ways. In some embodiments, a first middle air duct 02 is distributed at the tail end of the battery pack 8 and the first middle air duct 02 communicates with the return air duct 04 through a first heat dissipation channel, a second middle air duct 03 is distributed at the side of the battery pack 8 and the second middle air duct 03 communicates with the return air duct 04 through a second heat dissipation channel.

In the above structure, the second middle air duct 03 can be arranged on both sides of each battery pack 8; it is also possible to choose a battery pack 8 with a second intermediate duct 03 on only one side in the edge position.

The specific shapes and lengths of the first intermediate air duct 02, the second intermediate air duct 03 and the return air duct 04 are selected according to practical situations, and the embodiment of the utility model is not limited thereto.

In the above energy storage system, in order to facilitate the air flow in the first middle air duct 02 to enter the first heat dissipation channel of the battery pack 8, the first middle air duct 02 may be selected to extend along the height direction of the battery pack 8. Accordingly, in order to facilitate the air flow in the second middle air duct 03 to enter the second heat dissipation channel of the battery pack 8, the second middle air duct 03 may be selected to extend along the height direction of the battery pack 8.

The height direction of the battery pack 8 is the height direction of the energy storage device, and is also the vertical direction.

In some embodiments, in order to facilitate communication between the air supply port 21 of the refrigeration device 2 and the first intermediate air duct 02 and between the air supply port 21 of the refrigeration device 2 and the second intermediate air duct 03, the air supply duct 01 further includes an air supply duct 01, the air supply duct 01 communicates between the air supply port 21 and the first intermediate air duct 02, and the air supply duct 01 communicates between the air supply port 21 and the second intermediate air duct 03.

Since the first middle air duct 02 extends along the height direction of the battery pack 8 and the second middle air duct 03 extends along the height direction of the battery pack 8, the air supply duct 01 is located at the top of the energy storage device in order to facilitate cold air entering the first middle air duct 02 and the second middle air duct 03. It will be appreciated that the outlet of the air supply duct 01 is located at the top of the first inlet 021 of the first intermediate duct 02, and the outlet of the air supply duct 01 is located at the top of the second inlet 031 of the second intermediate duct 03.

In some embodiments, the battery pack 8 is arranged in at least two rows in the X-direction, i.e., the battery pack is arranged in at least two rows in the X-direction, the X-direction being perpendicular to the height of the energy storage device. Each column of battery packs 8 has a first intermediate air duct 02 and a second intermediate air duct 03 corresponding thereto.

The first middle duct 02 corresponding to each row of battery packs 8 means that the internal air flow enters the first middle duct 02 of the row of battery packs 8; the second middle duct 03 corresponding to each row of the battery packs 8 means that the internal air flows into the second middle duct 03 of the row of the battery packs 8.

The number of the first intermediate air passages 02 corresponding to each row of the battery packs 8 may be one or more, and correspondingly, the number of the second intermediate air passages 03 corresponding to each row of the battery packs 8 may be one or more, which is not limited according to the actual situation.

In order to improve the uniformity of the flow field in the energy storage system, the air supply channel inlet 011 of the air supply channel 01 is located in the middle of the air supply channel 01, the battery packs 8 are uniformly distributed on two sides of the air supply channel inlet 011, and the second middle air channel 03 is located between the first middle air channel 02 and the air supply channel inlet 011. Therefore, cold air enters the air supply duct 01 from the middle of the air supply duct 01, and uniformity of the cold air in the air supply duct 01 is improved, so that uniformity of a flow field in the energy storage system is improved.

In actual selection, the air supply duct inlet 011 may be selected to be located at another position of the air supply duct 01, which is not limited in the embodiment of the present utility model.

In the above embodiment, the air supply duct 01 is provided therein with the cold air distribution device for distributing the cold air in the air supply duct 01 to the duct corresponding to each row of the battery packs. It will be appreciated that the air duct corresponding to each column of battery packs includes a first intermediate air duct 02 corresponding to each column of battery packs 8 and a second intermediate air duct 03 corresponding to each column of battery packs 8.

In the energy storage system, the battery packs 8 in each row can be cooled, heat dissipation of the battery packs 8 in each row is realized, and the temperature equalizing effect of the energy storage system is improved.

As shown in fig. 1 to 4, in order to facilitate the uniform entry of the cool air into the first intermediate air duct 02 and the second intermediate air duct 03, the cool air distribution device may alternatively include a first ventilation board 3, where the first ventilation board 3 is disposed between the first intermediate air duct 02 and the supply air duct inlet 011, and a middle portion of the first ventilation board 3 is opposite to the supply air duct inlet 011, and the first ventilation board 3 extends from both ends to a middle portion thereof in a direction away from the supply air duct inlet 011. It will be appreciated that the middle of the first ventilation board 3 is further from the top duct inlet 011 than the two ends of the first ventilation board 3.

The first ventilation board 3 has ventilation holes, and the size, number, and distribution of ventilation holes are selected according to the actual situation, and the present embodiment is not limited thereto.

In the above structure, the air speed of the cold air entering from the air supply channel inlet 011 is reduced under the action of the first ventilation board 3, so that a part of cold air enters the second middle air channel 03, another part of cold air enters the first middle air channel 01, and the uniformity of cold air distribution is improved.

The specific structure of the first ventilation board 3 is selected according to the actual situation. In one aspect, the first ventilation board 3 may alternatively comprise two intersecting and connected ventilation sub-boards, the included angle between the two ventilation sub-boards being an obtuse angle. In this case, the ventilation dividing plate is a straight plate. Alternatively, the first ventilation board 3 may be an arcuate board. On the other hand, the first ventilation board 3 may be selected to have another structure, which is not limited in this embodiment.

The two ends of the first ventilation board 3 may extend to the last row of battery packs 8 (the last row of battery packs 8 in the air flow direction in the supply air duct 01), in which case the middle portion of the first ventilation board 3 to the end portions of the first ventilation board 3 cross the second inlet 031 of the at least one second intermediate air duct 03.

The first ventilation board 3 may not extend to the last row of battery packs 8 (the last row of battery packs 8 in the air flow direction in the air supply duct 01). In this case, if the battery packs 8 located on the same side as the air supply duct inlets 011 are at least two in rows, that is, at least two second intermediate ducts 03 located on the same side as the air supply duct inlets 011 are provided. In order to improve the uniformity of the flow field in the energy storage system, the cold air distribution device further comprises second air ventilation plates 4, and the second air ventilation plates 4 are arranged at the upstream of at least two second middle air channels 03 positioned on the same side of the inlet 011 of the air supply channel; of the two adjacent second air-passing plates 4 located on the same side as the air-sending duct inlet 011, the second air-passing plate 4 located upstream has a smaller aperture ratio than the second air-passing plate 4 located downstream in the direction in which the cool air flows through the second air-passing plates 4; further, the second ventilation board 4 and the end portion of the first ventilation board 3 are hermetically connected.

In the above-described structure, the middle portion of the first ventilation board 3 to the end portion of the first ventilation board 3 may be selected to span the second inlet 031 of the at least one second intermediate air duct 03, or the middle portion of the first ventilation board 3 to the end portion of the first ventilation board 3 may be selected to span the second inlet 031 of the second intermediate air duct 03.

In the above structure, under the action of the second ventilation plate 4, the cold air entering the air supply duct 01 can be uniformly distributed into the air ducts corresponding to each row of battery packs 8, so that the uniformity of the flow field in the energy storage system is further improved.

In the above energy storage system, among the first middle air duct 02, the second middle air duct 03 and the second ventilation board 4 corresponding to the same column of battery packs 8, the first middle air duct 02 and the second middle air duct 03 are located at one side of the second ventilation board 4.

In practice, at least one second ventilation board 4 may be selected to span the first inlet 021 of the first intermediate air duct 02. In this case, a part of the air channels of the first intermediate air channel 02 corresponds to one row of battery packs 8, and another part of the air channels of the first intermediate air channel 02 corresponds to another row of battery packs 8; it is also possible to choose each second ventilation board 4 to be located between the first inlets 021 of two adjacent first intermediate air ducts 02.

In the above energy storage device, the battery packs 8 may be arranged in one row, two rows, or at least three rows. In order to facilitate the air flow in the air duct to flow through the first heat dissipation channel of the battery pack 8, the battery pack 8 is arranged in one row or two rows. In order to improve the energy storage of the energy storage device, the battery packs 8 are arranged in two rows. In this case, the tail end of one row of the battery packs 8 is opposite to the tail end of the other row of the battery packs 8, the refrigerating device 2 is in one-to-one correspondence with each row of the battery packs 8, and the air duct is in one-to-one correspondence with each row of the battery packs 8. Therefore, each row of battery packs 8 can be independently radiated, and the mutual influence of the radiation of the two rows of battery packs 8 is avoided; moreover, when the refrigerating device 2 corresponding to one row of battery packs 8 fails, the heat dissipation of the other row of battery packs 8 is not affected, so that the other row of battery packs 8 can normally operate, and the reliability and stability of the energy storage system are improved.

In each row of the battery packs 8, the number of the battery packs 8 may be one or two or more in the height direction of the battery packs 8, and this is not limited in this embodiment according to the actual situation.

In the above energy storage system, the energy storage device may be one or more than two. In order to increase the energy storage capacity, at least two energy storage devices can be selected, and each energy storage device is provided with a refrigeration device 2 and an air duct corresponding to the energy storage device. Therefore, each energy storage device can be independently subjected to heat dissipation, and the mutual influence of heat dissipation of any two energy storage devices is avoided; in addition, when the refrigerating device 2 corresponding to one energy storage device fails, the heat dissipation of other energy storage devices is not affected, so that the other energy storage devices can normally operate, and the reliability and stability of the energy storage system are improved.

In some embodiments, to facilitate air supply and return of the refrigeration device 2, the air supply port 21 may be optionally located at the top end of the refrigeration device 2, and the air return port 22 may be located at a side of the refrigeration device 2, where the battery pack 8 and the air return port 22 are located at the same side of the refrigeration device 2.

If the air return port 22 is located at one side of the refrigerating device 2, the battery packs 8 are also distributed at one side of the refrigerating device 2; if the air return openings 22 are located at two sides of the refrigerating device 2, the battery packs 8 are also distributed at two sides of the refrigerating device 2, and it is understood that a part of the battery packs 8 are located at one side of the refrigerating device 2, and another part of the battery packs 8 are located at the other side of the refrigerating device 2, that is, the refrigerating device 2 is located between the part of the battery packs 8 and the other part of the battery packs 8.

Since the hot air is discharged from the head end of the battery pack 8, the refrigerating device 2 may be optionally located at the head end of the battery pack 8 in order to facilitate the return of the hot air to the refrigerating device 2. In this way, the return air inlet 22 of the refrigerating device 2 is close to the head end of the battery pack 8, so that hot air can flow back to the refrigerating device 2 conveniently.

As shown in fig. 2, fig. 4 and fig. 5, cold air generated by the refrigerating device 2 is discharged through the air supply port 21, the cold air flows into the air supply duct 01 from bottom to top (in this case, the air supply duct 01 can be communicated with the air supply port 21 through the connecting air duct), the cold air uniformly flows into air ducts (a first middle air duct 02 and a second middle air duct 03) corresponding to each row of battery packs 8 under the action of the first ventilating plate 3 and the second ventilating plate 4, a part of cold air flows through the first middle air duct 02 and a first heat dissipation channel of the battery packs 8 from top to bottom, hot air is formed after the cold air flows through the first heat dissipation channel, another part of cold air flows through the second middle air duct 03 and a second heat dissipation channel of the battery packs 8 from top to bottom, hot air is formed after the cold air flows through the second heat dissipation channel, and the two hot air flows uniformly to the air return air duct 04, and flows back to the refrigerating device through the air return port 22.

The thick solid arrows in fig. 2 indicate the air flow directions (the cold air flow direction and the hot air flow direction), and only the cold air flow direction in one second intermediate air duct 03 is shown in fig. 2. The thick solid arrows in fig. 4 indicate the airflow direction (hot air flow direction) in the return air duct 04. The thick solid arrows in fig. 5 indicate the air flow direction (hot air flow direction) in the first intermediate air duct 02.

In the energy storage system, the first intermediate air duct 02 and the second intermediate air duct 03 are formed in various manners. In some embodiments, to simplify the structure, the first middle duct 02 may be formed by the portion of the battery rack 7 located at the rear end of the battery pack 8 and the battery pack 8, or the first middle duct 02 may be formed by the portion of the battery rack 7 located at the rear end of the battery pack 8, and the second middle duct 03 may be formed by a vertical beam of the battery rack 7 located at the side of the battery pack 8.

The cooling device 2 may be provided on the battery holder 7 and/or the casing 1.

In some embodiments, in order to facilitate forming the air supply duct 01, a sealing plate 5 and a coaming 6 may be disposed at the top end of the battery rack 7, the sealing plate 5 covers all the battery packs 8, through holes communicating with the first middle duct 02 and the second middle duct 03 are reserved in the sealing plate 5, the coaming 6 is located at the periphery of the sealing plate 5, the top end of the coaming 6 is higher than the sealing plate 5, and the top plate, the coaming 6 and the coaming 5 of the housing 1 form the air supply duct 01. To facilitate the formation of the supply air duct inlet 011, the shroud 6 may be selected to be an open structure that forms the supply air duct inlet 011.

In the above embodiment, where the energy storage system includes the first ventilation board 3 and the second ventilation board 4, the first ventilation board 3 may be optionally disposed on the sealing board 5, and the second ventilation board 4 may be disposed on the sealing board 5 and the coaming 6. For ease of installation and distribution of cold air, the first ventilation board 3 and the second ventilation board 4 may be chosen to be perpendicular to the sealing board 5.

In some embodiments, to facilitate forming the return air duct 04, the top plate of the housing 1, the portion of the housing 1 near the front end of the battery pack 8, the shroud 6, the battery rack 7, the battery pack 8, and the refrigeration device 2 may be selected to form the return air duct 04. It will be appreciated that the refrigeration unit 2 is located at the head end of the battery pack 8.

In other embodiments, the air supply duct 01, the first intermediate duct 02, the second intermediate duct 03, and the return air duct 04 may alternatively be formed in other manners, which are not limited by the embodiment of the present utility model.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy storage system, comprising: a housing, an energy storage device within the housing, and a refrigeration device;

2. The energy storage system of claim 1, wherein the energy storage system comprises,

the first heat dissipation channel and the second heat dissipation channel are communicated in the battery pack;

3. The energy storage system of claim 2, wherein the first vent and the third vent are each one, the second vent is a plurality, and a sum of ventilation areas of all the second vents is greater than a ventilation area of the first vent and greater than a ventilation area of the third vent.

4. The energy storage system of claim 1, wherein the air duct comprises a first intermediate air duct, a second intermediate air duct, and a return air duct, wherein the inlets of the first intermediate air duct and the second intermediate air duct are both in communication with the supply air port of the refrigeration device, and the outlet of the return air duct is in communication with the return air port of the refrigeration device;

5. The energy storage system of claim 4, wherein the air duct further comprises an air supply duct, the air supply duct communicating the air supply port and the first intermediate duct, and the air supply duct communicating the air supply port and the second intermediate duct;

6. The energy storage system of claim 5, wherein the battery packs are in at least two columns in an X-direction, each column of the battery packs having the first and second intermediate air ducts corresponding thereto, the X-direction being perpendicular to a height direction of the energy storage device.

7. The energy storage system of claim 6, wherein in the X-direction, the supply air duct inlet of the supply air duct is located in the middle of the supply air duct, the battery packs are evenly distributed on both sides of the supply air duct inlet, and the second intermediate air duct is located between the first intermediate air duct and the supply air duct inlet.

8. The energy storage system of claim 7, wherein a cold air distribution device is disposed in the air supply duct, and the cold air distribution device is configured to distribute cold air in the air supply duct to the air duct corresponding to each row of the battery packs.

9. The energy storage system of claim 8, wherein the cold air distribution device comprises a first ventilation plate disposed between the first intermediate duct and the supply duct inlet, a middle portion of the first ventilation plate being opposite the supply duct inlet, the first ventilation plate extending from both ends thereof to a middle portion thereof in a direction away from the supply duct inlet.

10. The energy storage system of claim 9, wherein the energy storage system comprises,

the battery packs positioned on the same side of the inlet of the air supply duct are at least two rows;

11. The energy storage system of claim 10, wherein at least one of the second ventilation plates spans across the first inlet of the first intermediate duct.

12. The energy storage system of claim 9, wherein the energy storage system comprises,

the middle part of the first ventilating plate to the end part of the first ventilating plate transversely crosses the second inlet of at least one second middle air duct;

13. The energy storage system of claim 1, wherein said battery packs are arranged in two rows, with the trailing end of one row of said battery packs being opposite the trailing end of the other row of said battery packs; the refrigerating device corresponds to each row of battery packs one by one, and the air duct corresponds to each row of battery packs one by one;

14. The energy storage system of any of claims 1-13, wherein the supply air inlet is located at a top end of the refrigeration device, the return air inlet is located at a side of the refrigeration device, the battery pack and the return air inlet are located on the same side of the refrigeration device, and the refrigeration device is located at a head end of the battery pack.