Modular energy storage device

Abstract

The utility model provides a module type energy storage device, the module type energy storage device comprises a box body and a battery body, the box body comprises an inlet end and a connecting end which face each other, a plurality of installation modules are arranged in the box body, each installation module comprises a bearing moving part capable of bearing the battery body, and the bearing moving part is arranged on the box body. The bearing moving part can enter or leave the mounting module from the entering end, and under the condition that the battery body is arranged on the mounting module, the battery body is detachably connected with the connecting end. According to the modular energy storage device, the energy storage requirement and the use requirement can be met, the modular and integrated design purpose can be achieved, the overall structure is compact, the occupied area is small, the layout is reasonable, the installation requirement of each battery body can be met, more battery bodies can be stored in the same space, the energy storage capacity is improved, and the service life is prolonged. And independent installation and maintenance are facilitated, so that the working efficiency and the use safety are ensured.

Description

Technical Field

[0001] This application relates to the field of energy storage battery technology, and in particular to a modular energy storage device. Background Technology

[0002] Energy storage containers are highly integrated energy storage devices that house multiple energy storage battery modules and connect to external devices through a few interfaces. They are characterized by high integration, small footprint, and good scalability, making them particularly suitable for industrial and commercial energy storage. Industrial and commercial energy storage differs from large-scale energy storage. Ground-based energy storage power stations, which are based on large-scale energy storage, typically require space for commissioning, after-sales maintenance, etc., and thus occupy a large area, making them unsuitable for industrial and commercial energy storage.

[0003] In order to improve the space utilization of energy storage containers, existing industrial and commercial energy storage devices usually arrange a large number of battery modules in a limited space. Due to the dense arrangement, the battery module density is high, which makes it inconvenient to install and maintain the battery modules. In addition, the battery modules and power distribution modules generate a lot of heat during operation. Since the dense arrangement cannot dissipate the heat quickly, the heat dissipation efficiency of the energy storage container will be reduced, which will affect the operation of the energy storage container.

[0004] Therefore, a modular energy storage device is needed to solve the above problems. Utility Model Content

[0005] In view of this, in order to overcome the shortcomings of the prior art, this utility model provides a modular energy storage device, which effectively solves the problems of inconvenient installation and maintenance of battery modules and poor heat dissipation efficiency in existing industrial and commercial energy storage devices.

[0006] According to the present invention, a modular energy storage device includes a housing and a battery body. The housing includes an entry end and a connection end facing each other. The interior of the housing includes multiple installation modules. Each installation module includes a supporting movable component capable of supporting the battery body. The supporting movable component can enter or leave the installation module from the entry end. When the battery body is disposed in the installation module, the battery body is detachably connected to the connection end.

[0007] Preferably, the multiple installation modules are stacked sequentially from top to bottom; the number of battery bodies is multiple, and the multiple battery bodies are arranged in a one-to-one correspondence with the multiple installation modules.

[0008] Preferably, the interior of the housing is further provided with a partition, which divides the interior space of the housing into a first accommodating space and a second accommodating space. Multiple installation modules are disposed in the first accommodating space, and the second accommodating space is provided with an energy storage box and a chiller unit.

[0009] Preferably, the installation module includes a support plate disposed on the inner sidewall of the first accommodating space, and when the carrier movable member is located in the installation module, the carrier movable member is disposed on the support plate.

[0010] Preferably, the end of the mounting module near the connection end is further provided with a baffle, which can limit the battery body when the battery body enters the mounting module from the entry end along with the carrier moving member.

[0011] Preferably, the bottom of the moving support component is provided with a heat dissipation vent.

[0012] Preferably, the supporting moving member is formed in a U-shape, the U-shape including two vertical plates and one horizontal plate, the two vertical plates abutting against the support plate, the horizontal plate being close to the entry end, and the ends of the vertical plates away from the horizontal plate being able to abut against the baffle.

[0013] Preferably, the entry end and the connection end are respectively provided with a first door and a second door;

[0014] The inside of the connecting end is provided with a liquid delivery channel and a liquid return channel on both sides respectively. The liquid inlet end of the battery body is detachably connected to the liquid delivery channel, and the liquid outlet end of the battery body is detachably connected to the liquid return channel.

[0015] Preferably, the inner diameter of the return channel is larger than the inner diameter of the delivery channel.

[0016] Preferably, a third door is provided at the first end of the second accommodating space, and the second end of the second accommodating space is closed; and / or ventilation windows are provided at both the first and second ends of the second accommodating space, the opening positions of the ventilation windows corresponding to the installation positions of the chiller unit.

[0017] According to this utility model, the modular energy storage device, by placing the battery body inside the casing, can guarantee energy storage needs and usage requirements. By incorporating multiple installation modules within the casing, it achieves modular and integrated design, resulting in a compact overall structure, small footprint, and rational layout. It also meets the installation requirements of each battery body, allowing for the storage of more batteries in the same space, thus increasing energy storage capacity and facilitating individual installation and maintenance. The modular energy storage device, through its entry and connection ends within the casing, provides auxiliary heat dissipation at these two ends, improving heat dissipation efficiency and ensuring both operational efficiency and safety.

[0018] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the connection end of a modular energy storage device according to an embodiment of the present invention is shown.

[0021] Figure 2 A schematic diagram of the inlet end of a modular energy storage device according to an embodiment of the present invention is shown.

[0022] Figure 3 A front view of a modular energy storage device in a loaded state according to an embodiment of the present invention is shown;

[0023] Figure 4 A schematic diagram of the modular energy storage device according to an embodiment of the present invention in an unloaded state is shown.

[0024] Figure 5 This is a structural schematic diagram from another perspective showing the modular energy storage device according to an embodiment of the present invention in an unloaded state.

[0025] Reference numerals in the attached drawings: 1-Energy storage device body; 11-Box; 111-Mounting bracket; 112-First support; 113-Second support; 114-Support plate; 115-Baffle; 116-Partition; 12-First door; 13-Third door; 14-Second door; 15-First ventilation window; 16-Second ventilation window; 17-Carrying moving part; 2-Battery body; 21-Inlet pipe; 22-Drain pipe; 3-Chiller unit; 31-Liquid delivery channel; 32-Liquid return channel; 4-Energy storage box. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] According to the present invention, a modular energy storage device is provided, such as... Figures 1 to 5 As shown, this modular energy storage device, due to its compact overall structure, high integration, small footprint, and good scalability, is suitable for industrial and commercial energy storage and can meet the needs of industrial and commercial users. The modular energy storage device includes a housing 11 and a battery body 2.

[0031] In the following description, reference will be made to Figures 1 to 5 This section describes the detailed structure of the housing 11 and battery body 2 of the modular energy storage device.

[0032] like Figure 1 and Figure 2 As shown in the embodiment, the modular energy storage device is represented by the energy storage device body 1. The energy storage device body 1 may include a box 11 formed as a cuboid structure. The box 11 includes two facing entry ends and connection ends. The entry ends and connection ends may be, for example, a rear end and a front end of a cuboid structure. The rear end (entry end) can be used for loading, unloading and inserting the battery body 2, and the front end (connection end) can be used for connecting the battery body 2, for maintenance operations by operators, and for auxiliary heat dissipation by opening the front box door during use.

[0033] like Figure 3 and Figure 4 As shown, the interior of the housing 11 contains multiple mounting modules for installing the battery body 2. Each mounting module includes a supporting movable component 17, which supports the battery body 2. Thus, as... Figure 3 As shown, the housing 11 can have a loaded state with the battery body 2 installed and an unloaded state without the battery body 2 inside. The battery body 2 can be, for example, a battery pack in the prior art.

[0034] The carrier-mounted movable component 17 of the mounting module can enter or exit the mounting module from the entry end (rear end of the housing 11). This entry or exit can be assisted, for example, by using a robotic arm (not shown). Specifically, the robotic arm can be connected to the carrier-mounted movable component 17. This connection can be achieved, for example, by the robotic arm directly supporting the carrier-mounted movable component 17 from its bottom, or by using fasteners or other connecting components for a fixed connection. When the carrier-mounted movable component 17 needs to enter the mounting module, the robotic arm enters from the entry end of the housing 11 and delivers the carrier-mounted movable component 17 into the corresponding mounting module. When the carrier-mounted movable component 17 needs to leave the mounting module, the robotic arm enters from the entry end of the housing 11, supports the carrier-mounted movable component 17, then separates the carrier-mounted movable component 17 from the mounting module, and finally exits from the entry end.

[0035] like Figure 3 As shown in the embodiment, when the battery body 2 is disposed in the mounting module, the battery body 2 is detachably connected to the connection end. The connection end may be provided with a quick connector, which allows the battery body 2 to be quickly connected to the connection end to achieve cooling and normal storage of the battery body 2.

[0036] In summary, this modular energy storage device, by placing the battery body 2 inside the housing 11, can guarantee energy storage needs and usage requirements. By incorporating multiple installation modules within the housing 11, it achieves modular and integrated design, resulting in a compact overall structure, small footprint, and rational layout. This also meets the installation requirements of each battery body 2, allowing for the storage of more battery bodies 2 within the same space, thereby increasing energy storage capacity and facilitating individual installation and maintenance. Through the entry and connection ends provided in the housing 11, this modular energy storage device can achieve auxiliary heat dissipation at these two ends, improving heat dissipation efficiency and thus ensuring operational efficiency and safety.

[0037] Preferably, such as Figure 1 and Figure 2 As shown in the embodiment, multiple battery bodies 2 can be disposed inside the housing 11 to increase the energy storage capacity of the energy storage device 1. Since the housing 11 is formed as a cuboid structure, multiple battery bodies 2 can be stacked inside the housing 11, making the internal layout of the housing 11 more compact and reasonable, and reducing the floor space occupied. Furthermore, to facilitate the installation of the battery bodies 2, multiple mounting modules are stacked sequentially from top to bottom, and the multiple battery bodies 2 are arranged in a one-to-one correspondence with the multiple mounting modules.

[0038] Preferably, such as Figure 3 and Figure 4As shown in the embodiment, the interior of the housing 11 is further provided with a partition 116, dividing the internal space of the housing 11 into a first accommodating space and a second accommodating space. Multiple installation modules are disposed in the first accommodating space, and the second accommodating space houses the energy storage box 4 and the chiller unit 3. The volume of the first accommodating space is larger than that of the second accommodating space. Because the battery body 2 is relatively large and multiple battery bodies 2 need to be stacked, the multiple installation modules are disposed in the first accommodating space. Because the energy storage box 4 and the chiller unit 3 are relatively narrow, they are disposed in the smaller second accommodating space. This arrangement allows for more efficient use of the internal space of the housing 11.

[0039] The energy storage box 4 can be, for example, a high-voltage box in the field of energy storage battery technology, and can be used for circuit control and power transmission. The chiller unit 3 can be connected to the battery body 2 to facilitate heat dissipation from the battery body 2.

[0040] Preferably, such as Figures 1 to 3 As shown in the embodiment, the entry end and the connection end are respectively provided with a first door 12 and a second door 14. During periods of high heat dissipation demand and simultaneous operation of multiple battery bodies 2, the first door 12 and the second door 14 can be opened for auxiliary heat dissipation. When it is necessary to repair the internal structure of the housing 11 or the battery body 2, the first door 12 can be opened to facilitate maintenance by operators from the connection end of the housing 11. When it is necessary to replace the battery body 2, the second door 14 can be opened to allow a robotic arm to operate from the entry end of the housing 11.

[0041] Preferably, such as Figures 1 to 3 As shown in the embodiment, a liquid delivery channel 31 and a liquid return channel 32 are respectively provided on both sides of the interior of the connecting end. Both the liquid delivery channel 31 and the liquid return channel 32 can be connected to the chiller unit 3 to realize the circulation of coolant. The connection method between the liquid delivery channel 31 and the liquid return channel 32 and the housing 11 can be, for example, a commonly used pipe connection, such as using a connecting hook, welding, or bolt connection. In addition, the liquid return channel 32 can also be fixed on the partition 116 to make full use of the internal space of the housing 11.

[0042] Furthermore, since both the liquid delivery channel 31 and the liquid return channel 32 are located at the connection end of the housing 11, the moving part 17 will not interfere with the liquid delivery channel 31 and the liquid return channel 32 when it enters or leaves from the entry end. Moreover, the installation via the moving part 17 allows each battery body 2 to be installed and disassembled independently without interference, ensuring installation and maintenance efficiency.

[0043] Furthermore, since both the liquid delivery channel 31 and the liquid return channel 32 are located inside the connection end, the housing 11 can be formed as an integrated structure. All connecting parts and user parts are located inside the housing 11, which can also make full use of the space inside the housing 11 and meet the miniaturization requirements.

[0044] Preferably, such as Figure 3 As shown in the embodiment, each battery body 2 may include an inlet end and an outlet end at its end, for receiving and discharging coolant, respectively. The coolant delivery channel 31 may include multiple inlet pipes 21, and the coolant return channel 32 may include multiple outlet pipes 22. The inlet end and outlet end of each battery body 2 may be connected to one inlet pipe 21 and one outlet pipe 22 respectively. Each end of the inlet pipe 21 connected to the battery body 2 and each end of the outlet pipe 22 connected to the battery body 2 may be provided with a quick-connect fitting, which allows for quick docking or disengagement with the battery body 2. The quick-connect fitting can be a common connector in the prior art, and its connection and installation methods will not be described in detail here. This allows the end of the battery body 2 to be detachably connected to the coolant delivery channel 31 and the coolant return channel 32. In addition, since the inlet pipe 21, outlet pipe 22, liquid delivery channel 31 and return channel 32 are all rigid fixed pipes, they can also play a certain limiting role when the battery body 2 is connected, and at the same time prevent the battery body 2 from being displaced during installation and maintenance, thus affecting the efficiency of installation and maintenance.

[0045] Preferably, such as Figure 3 As shown, in this embodiment, the inner diameter of the return channel 32 is larger than the inner diameter of the delivery channel 31. Furthermore, the inner diameter of the return channel 32 is twice the inner diameter of the delivery channel 31, so as to facilitate rapid circulation of the coolant through the pressure difference within the battery body 2.

[0046] Preferably, such as Figure 4 As shown, in this embodiment, each mounting module may include a support plate 114, which is disposed on the inner wall of the first accommodating space. The support plate 114 may include two plates disposed on two opposite surfaces of the inner wall of the first accommodating space. When the movable support member 17 is located in the mounting module, the movable support member 17 is disposed on the support plate 114.

[0047] Preferably, such as Figure 4As shown in the embodiment, a baffle 115 is also provided at the end of the installation module near the connection end. When the battery body 2 enters the installation module from the entry end along with the carrier moving member 17, the battery body 2 can abut against the baffle 115. The baffle 115 can limit the battery body 2, thereby ensuring that the battery body 2 can be installed in place and preventing the carrier moving member 17 from slipping off. Furthermore, the baffle 115 in one installation module is arranged opposite to the support plate 114 to facilitate individual limiting of each battery body 2.

[0048] Preferably, such as Figure 3 As shown in the embodiment, the first accommodating space may be equipped with a mounting frame 111. The mounting frame 111 can be understood as a frame for multiple mounting modules, and the aforementioned support plate 114 and baffle 115 can both be part of the mounting frame 111. The mounting frame 111 is detachably connected to the housing 11, and the detachable connection method can be, for example, using fastening bolts. Multiple battery bodies 2 can be modularly integrated through the mounting frame 111, and the modularly integrated mounting frame 111 can be installed entirely into the housing 11 or completely removed from the housing 11.

[0049] Preferably, such as Figure 4 and Figure 5 As shown, in this embodiment, a heat dissipation vent is provided at the bottom of the carrier movable member 17 to facilitate better heat dissipation of the battery body 2 located on the carrier movable member 17.

[0050] Preferably, such as Figure 4 and Figure 5 As shown, in this embodiment, the supporting movable member 17 can be formed into a U-shaped structure. The U-shaped structure can include two vertical plates and one horizontal plate. The two vertical plates abut against the support plate 114, the horizontal plate is close to the entry end, and the ends of the vertical plates away from the horizontal plate can abut against the baffle 115. Specifically, the opening of the U-shaped structure faces the connecting end of the housing 11, and the two sides of the U-shaped structure (i.e., the two vertical plates) overlap the support plate 114 to support the battery body 2. The closed end of the U-shaped structure (i.e., the end where the horizontal plate is located) can ensure the stability of the overall structure and facilitate the pulling action at the entry end of the housing 11. In addition, when the battery body 2 is installed on the supporting movable member 17, one end of the battery body 2 is connected to the liquid delivery channel 31 and the liquid return channel 32 at the connecting end of the housing 11, which can support that end of the battery body 2. The two sides of the U-shaped structure support the two sides of the battery body 2 respectively, while the other end of the battery body 2 is supported by the closed end of the U-shaped structure. This arrangement can ensure the stability of the battery body 2 during use, and at the same time, a larger heat dissipation vent can be opened on the supporting movable member 17.

[0051] Preferably, such as Figures 1 to 5As shown in the embodiment, when the interior of the housing 11 is divided into a first accommodating space and a second accommodating space by a partition 116, the first accommodating space is used to accommodate multiple battery bodies 2, and the front and rear ends of the first accommodating space are the entry end and the connection end. A first door 12 and a second door 14 are respectively located at the front and rear ends of the first accommodating space. Operators can install and inspect the connection between the battery body 2 and the liquid delivery channel 31 and the liquid return channel 32 at the first door 12. The second door 14 facilitates the removal or installation of the battery body 2 into the housing 11. Furthermore, when the internal temperature of the housing 11 rises and the heat dissipation effect is poor, the first door 12 and the second door 14 can be opened to achieve rapid heat dissipation within the first accommodating space, preventing heat spread and other phenomena.

[0052] Preferably, such as Figures 1 to 5 As shown, in this embodiment, a third door 13 is provided at the first end of the second accommodating space, and the second end of the second accommodating space is closed. Since the second accommodating space does not need to be equipped with a liquid delivery channel 31 and a liquid return channel 32, the chiller unit 3 and the energy storage tank 4 can be installed or removed from either end of the second accommodating space, and thus only the third door 13 needs to be installed at one end of the second accommodating space.

[0053] Preferably, such as Figure 1 and Figure 2 As shown, in this embodiment, ventilation windows are provided at both ends of the second accommodating space, which can be, for example, a first ventilation window 15 and a second ventilation window 16. Specifically, a first ventilation window 15 is provided on the third door 13 of the second accommodating space, and a second ventilation window 16 is provided on the other end opposite to the third door 13, to facilitate air convection and improve heat exchange efficiency.

[0054] Preferably, such as Figure 3 and Figure 4 As shown, in this embodiment, the chiller unit 3 is fixed in the second accommodating space by the second bracket 113, and the chiller unit 3 is located between the first ventilation window 15 and the second ventilation window 16.

[0055] Preferably, such as Figure 3 and Figure 4 As shown, in this embodiment, the energy storage box 4 is installed in the second accommodating space by the first bracket 112, which can fix the energy storage box 4 on the one hand, and leave sufficient heat dissipation space around the energy storage box 4 on the other hand.

[0056] This modular energy storage device, by housing the battery cells inside the enclosure, ensures both energy storage capacity and usage requirements. Multiple installation modules within the enclosure enable a modular and integrated design, resulting in a compact structure, small footprint, and rational layout. This design also accommodates the installation needs of each battery cell, allowing for the storage of more cells in the same space, thus increasing energy storage capacity and facilitating individual installation and maintenance. The modular energy storage device features entry and connection points within the enclosure, enabling auxiliary heat dissipation at these ends to improve heat dissipation efficiency, thereby ensuring operational efficiency and safety.

[0057] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A modular energy storage device, characterized in that, The modular energy storage device includes a housing and a battery body. The housing includes an entry end and a connection end facing each other. The interior of the housing includes multiple installation modules. Each installation module includes a supporting movable component capable of supporting the battery body. The supporting movable component can enter or leave the installation module from the entry end. When the battery body is installed in the installation module, the battery body is detachably connected to the connection end.

2. The modular energy storage device according to claim 1, characterized in that, Multiple installation modules are stacked sequentially from top to bottom; The number of battery bodies is multiple, and each of the multiple battery bodies is set up in a one-to-one correspondence with a multiple of the mounting modules.

3. The modular energy storage device according to claim 1, characterized in that, The interior of the enclosure is also provided with a partition, which divides the interior space of the enclosure into a first accommodating space and a second accommodating space. Multiple installation modules are arranged in the first accommodating space, and the second accommodating space is provided with an energy storage box and a chiller unit.

4. The modular energy storage device according to claim 3, characterized in that, The installation module includes a support plate disposed on the inner sidewall of the first accommodating space. When the carrier movable component is located in the installation module, the carrier movable component is disposed on the support plate.

5. The modular energy storage device according to claim 4, characterized in that, The mounting module is also provided with a baffle at the end near the connection end. When the battery body enters the mounting module from the entry end along with the carrier moving member, the baffle can limit the battery body.

6. The modular energy storage device according to claim 1, characterized in that, The bottom of the moving support component is provided with a heat dissipation vent.

7. The modular energy storage device according to claim 5, characterized in that, The supporting moving member is formed into a U-shaped structure, which includes two vertical plates and one horizontal plate. The two vertical plates abut against the support plate, the horizontal plate is close to the entry end, and the ends of the vertical plates away from the horizontal plate can abut against the baffle.

8. The modular energy storage device according to claim 1, characterized in that, The entry end and the connection end are respectively provided with a first box door and a second box door; The inside of the connecting end is provided with a liquid delivery channel and a liquid return channel on both sides respectively. The liquid inlet end of the battery body is detachably connected to the liquid delivery channel, and the liquid outlet end of the battery body is detachably connected to the liquid return channel.

9. The modular energy storage device according to claim 8, characterized in that, The inner diameter of the return channel is larger than the inner diameter of the delivery channel.

10. The modular energy storage device according to claim 3, characterized in that, The second receiving space has a third door at its first end, and the second end of the second receiving space is closed; and / or Ventilation windows are provided at both the first and second ends of the second accommodating space, and the location of the ventilation windows corresponds to the location of the chiller unit.

Images