High-pressure direct-hanging type flexible energy storage container structure

Abstract

The invention relates to the technical field of energy storage containers, and discloses a high-pressure direct-hanging type flexible energy storage container structure which comprises a container body, a liquid cooling unit cabin, a battery PACK cabin, a high-pressure cabin and a control cabin, and the liquid cooling unit cabin, the battery PACK cabin, the high-pressure cabin and the control cabin are divided in the container body. The liquid cooling unit cabin is independently arranged on the leftmost side of the container body, and a plurality of liquid cooling units are arranged in the liquid cooling unit cabin; the battery PACK cabin is arranged on the right side of the liquid cooling unit cabin, and a plurality of batteries PACKs in the battery PACK cabin are connected with the liquid cooling unit through liquid cooling pipelines; the high-pressure cabin and the control cabin are both arranged on the right side of the battery PACK cabin, and the high-pressure cabin is located above the control cabin. And the high-pressure cabin is communicated with the battery PACK cabin. The space layout is optimized, the occupied area is saved, wiring is reduced, safe isolation of high-voltage and low-voltage devices is achieved, the liquid cooling pipeline distance is reduced, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage containers, and in particular to a high-voltage direct-hanging flexible energy storage container structure. Background Art

[0002] With the continuous development of new energy technologies, the role of energy storage systems in power transmission is becoming increasingly important. According to different power transmission technology routes, energy storage systems can be divided into two technologies: low-voltage boost and high-voltage direct-mounted. Compared with the traditional low-voltage boost energy storage system, the high-voltage direct-mounted energy storage system, as a new technical path, has higher cycle efficiency, reduces land occupation, and can avoid the problem of unbalanced charge state between battery modules under traditional methods, and reduce the effective capacity attenuation after long-term operation. The high-voltage direct-mounted energy storage system is expected to become one of the mainstream technologies in the field of large-capacity energy storage, providing more reliable support for the development of new energy.

[0003] The existing high-voltage direct-mounted energy storage system solution is mainly based on clusters. Each cluster contains multiple battery PACKs and a set of PCS equipment. The main power of multiple battery PACKs in each cluster is connected in series to the energy storage PCS equipment. Each cluster is equipped with a set of PCS equipment. The PCS equipment of multiple clusters is connected in series to achieve voltage boosting.

[0004] The structural layout of the high-voltage direct-mounted energy storage system in the prior art has the following shortcomings: ① Due to the power limitation of the PCS equipment, more small-capacity battery PACKs are required to match the PCS equipment, which increases the system footprint and increases the customer's land cost; ② More battery PACKs require a large number of main power cables when charging and discharging, which increases the failure probability of the energy storage system when the high-voltage system is running; ③ The high-voltage and low-voltage layouts are unreasonable, increasing the safety risks during debugging and operation and maintenance; ④ When using centralized liquid cooling units for heat dissipation, too many pipelines will increase the risk of pipeline leakage, and too long liquid cooling pipelines will increase losses and reduce heat dissipation efficiency. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a high-voltage direct-hanging flexible energy storage container structure, which optimizes the spatial layout, saves floor space, reduces wiring, achieves safe isolation of high-voltage and low-voltage devices, reduces the distance of liquid cooling pipelines, and improves heat dissipation efficiency.

[0006] To achieve the above-mentioned object, the present invention provides a high-voltage direct-hanging flexible energy storage container structure, comprising: a container body and a liquid cooling unit compartment, a battery PACK compartment, a high-voltage compartment, and a control compartment divided inside the container body;

[0007] The liquid cooling unit compartment is arranged separately on the leftmost side of the container body, and a plurality of liquid cooling units are arranged in the liquid cooling unit compartment;

[0008] The battery PACK compartment is arranged on the right side of the liquid cooling unit compartment, a plurality of battery PACKs are arranged in the battery PACK compartment, and the battery PACK is connected to the liquid cooling unit through a liquid cooling pipeline;

[0009] The high-voltage compartment and the control compartment are arranged on the right side of the battery PACK compartment, and the high-voltage compartment is located above the control compartment; the high-voltage compartment and the battery PACK compartment are communicated with each other.

[0010] Furthermore, the battery PACK is provided with a liquid cooling plate, a liquid cooling channel is provided in the liquid cooling plate, and the liquid cooling channel is connected to the liquid cooling pipeline through a joint.

[0011] Furthermore, the liquid cooling unit compartment is provided with a mesh door panel.

[0012] Furthermore, an insulating frame is provided in the battery PACK compartment. The insulating frame is composed of a plurality of insulating profiles assembled together to form a space for placing and fixing a plurality of battery PACKs, and is used for electrical isolation between adjacent battery PACKs and between a battery PACK and a container body.

[0013] Furthermore, the liquid cooling pipeline includes a water inlet pipeline, a water return pipeline and multiple liquid cooling pipeline branches. The water inlet pipeline is arranged below all battery PACKs, and the water return pipeline is arranged above all battery PACKs, forming a bottom-in and top-out structural layout; multiple liquid cooling pipeline branches are arranged in parallel between the water pipeline and the water return pipeline, and each liquid cooling pipeline branch is provided with multiple small branch pipelines, which are respectively connected to the inside of each battery PACK.

[0014] Furthermore, the multiple small branch pipelines on each of the liquid cooling pipeline branches are in a parallel structure.

[0015] Furthermore, a wire entry hole is provided at the bottom of the left side of the battery PACK compartment, and the high-voltage cable penetrates into the battery PACK compartment through the wire entry hole and is connected to the first battery PACK. The first battery PACK is connected to the second battery PACK through a series copper busbar, and the second battery PACK is connected to the third battery PACK through a series copper busbar, and so on, all battery PACKs are connected in series, and the last battery PACK is connected to the high-voltage compartment through the cascade copper busbar;

[0016] The high-voltage compartment is provided with a wire outlet hole, and the cascade copper busbar connected to the high-voltage compartment passes through the wire outlet hole through a high-voltage cable and is connected to the power grid outside the container body.

[0017] Furthermore, a transformer is arranged in the high-voltage compartment, and the transformer is used to provide auxiliary power for the battery PACK.

[0018] Furthermore, a control cabinet and fire-fighting equipment are arranged in the control cabin.

[0019] According to the specific embodiment provided by the present invention, the high-voltage direct-hanging flexible energy storage container structure provided by the present invention discloses the following technical effects:

[0020] (1) The container body is divided into a liquid cooling unit compartment, a battery pack compartment, a high-voltage compartment, and a control compartment. The centralized and integrated compartment design reduces the volume of the container, reduces the floor space, and reduces land costs.

[0021] (2) Multiple battery packs in the battery pack compartment are connected in series using cascade copper bars to reduce the number of main power cables and plugs, thereby reducing the failure rate of the energy storage system;

[0022] (3) The battery PACK compartment, the high-voltage part of the high-voltage compartment and the low-voltage part of the control compartment are completely isolated through the compartment design, reducing the safety risks during commissioning and operation and maintenance;

[0023] (4) The liquid cooling unit and liquid cooling pipelines are arranged in a container, which reduces the distance of the liquid cooling pipelines, reduces the risk of liquid cooling pipeline leakage, reduces heat loss, and improves heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0025] Figure 1 This is a layout diagram of a high-voltage direct-mounted flexible energy storage container structure shown in an embodiment of the present invention;

[0026] Figure 2 This is a front view of a high-voltage direct-hanging flexible energy storage container structure shown in an embodiment of the present invention;

[0027] Figure 3 A top view of a high-voltage direct-hanging flexible energy storage container structure shown in an embodiment of the present invention;

[0028] Description of reference numerals:

[0029] 1. Container body; 2. Liquid cooling unit compartment; 3. Battery PACK compartment; 4. High-voltage compartment; 5. Control compartment; 6. Liquid cooling unit; 7. Water inlet pipeline; 8. Water return pipeline; 9. Battery PACK; 10. Cascade copper busbar; 11. Transformer; 12. Wire inlet hole; 13. Wire outlet hole; 14. Insulation frame; 15. Control cabinet; 16. Fire-fighting equipment. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of this patent, if there are terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship actually shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in combination with the embodiments and according to specific circumstances.

[0032] Unless otherwise clearly specified and limited, in this patent, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The purpose of the present invention is to provide a high-voltage direct-hanging flexible energy storage container structure, which optimizes the spatial layout, saves floor space, reduces wiring, achieves safe isolation of high-voltage and low-voltage devices, reduces the distance of liquid cooling pipelines, and improves heat dissipation efficiency.

[0034] like Figure 1-Figure 3 As shown, the high-voltage direct-hanging flexible energy storage container structure provided by the embodiment of the present invention includes: a container body 1 and a liquid cooling unit compartment 2, a battery PACK compartment 3, a high-voltage compartment 4, and a control compartment 5 divided inside the container body 1;

[0035] The liquid cooling unit compartment 2 is arranged separately at the leftmost side of the container body 1, and the heat emitted during operation does not affect the normal operation of the equipment in other compartments. A plurality of liquid cooling units 6 are arranged in the liquid cooling unit compartment 2;

[0036] The battery PACK compartment 3 is arranged on the right side of the liquid cooling unit compartment 2, close to the liquid cooling unit compartment 2, and a plurality of battery PACKs 9 are arranged in the battery PACK compartment 3, and the battery PACKs 9 are connected to the liquid cooling unit 6 through a liquid cooling pipeline;

[0037] The high-voltage compartment 4 and the control compartment 5 are both arranged on the right side of the battery PACK compartment 3, and the high-voltage compartment 4 is located above the control compartment 5; Figure 1 As shown in the figure, the high-voltage cabin 4 is located at the upper right of the container body 1, and the high-voltage cabin 4 is interconnected with the battery PACK cabin 3, which is convenient for connecting with the cascade copper bus of the battery PACK. Both the high-voltage cabin 4 and the battery PACK cabin 3 are high-voltage electrical;

[0038] The control cabin 5 is arranged at the lower right side of the container body 1 . The voltage inside the cabin is low and the control cabin 5 is electrically isolated from both the high voltage cabin 4 and the battery PACK cabin 3 .

[0039] The battery PACK 9 is provided with a liquid cooling plate, and a liquid cooling channel is provided in the liquid cooling plate, and the liquid cooling channel is connected to the liquid cooling pipeline through a joint. The liquid cooling unit 6 delivers the cooling liquid to the battery PACK through the liquid cooling pipeline.

[0040] The liquid cooling unit compartment 2 is provided with a mesh door panel to ensure that the liquid cooling unit has sufficient air inlet and outlet areas. At the same time, the mesh door panel can protect the liquid cooling unit from being damaged by small animals and other solid debris.

[0041] An insulating frame 14 is provided in the battery PACK compartment 3. The insulating frame 14 is composed of a number of insulating profiles assembled together to form a space for placing and fixing multiple battery PACKs 9, which is convenient for placing and fixing multiple battery PACKs 9 and is used for electrical isolation between adjacent battery PACKs and between the battery PACK and the container body, ensuring that the electrical safety requirements between the battery PACKs and between the battery PACK and the container body are met.

[0042] The insulating frame is similar to a multi-layer bookshelf or storage rack structure, so that multiple battery PACKs 9 are arranged in multiple layers and columns.

[0043] The liquid cooling pipeline includes a water inlet pipeline 7, a water return pipeline 8 and a plurality of liquid cooling pipeline branches. The water inlet pipeline 7 is arranged below all battery PACKs 9, and the water return pipeline 8 is arranged above all battery PACKs 9, forming a bottom-in-top-out structural layout, ensuring that the bubbles inside the pipeline are concentrated inside the water return pipeline 8, and then the bubbles are discharged through a specific exhaust valve to ensure the heat dissipation efficiency of the battery PACK; the plurality of liquid cooling pipeline branches are arranged in parallel between the water pipeline 7 and the water return pipeline 8, and each liquid cooling pipeline branch is provided with a plurality of small branch pipelines, which are respectively connected to the liquid cooling plate inside each battery PACK (9), and the small branch pipeline liquid cooling plate is provided with a liquid cooling flow channel connected through a joint.

[0044] The multiple small branch pipelines on each of the liquid cooling pipeline branches are in a parallel structure, that is, each of the liquid cooling pipeline branches is connected to multiple battery PACKs in parallel, which effectively reduces the temperature difference between the battery modules.

[0045] The left bottom of the battery PACK compartment 3 is provided with a wire entry hole 12 to facilitate direct connection between external high-voltage cables and battery PACKs. The high-voltage cable passes through the wire entry hole 12 into the battery PACK compartment 3 and is connected to the first battery PACK. The first battery PACK is connected to the second battery PACK via the series copper bus 10, and the second battery PACK is connected to the third battery PACK via the series copper bus 10, and so on. All battery PACKs are connected in series to increase the overall voltage to reach the required voltage. After the battery PACKs are connected in series, the last battery PACK is connected to the high-voltage compartment 4 via the cascade copper bus 10;

[0046] The high-voltage compartment 4 is provided with a wire outlet hole 13 , and the cascade copper busbar 10 connected to the high-voltage compartment 4 passes through the wire outlet hole 13 through a high-voltage cable and is connected to the power grid outside the container body 1 .

[0047] Furthermore, a transformer 11 is provided in the high-voltage compartment 4, and the transformer 11 is used to provide auxiliary power for the battery PACK, and the transformer 11 is connected to a control cabinet 15 in the control compartment 5. The control cabinet 15 provides auxiliary power, which is input to the transformer, and after isolation and transformation by the transformer, provides working power for the battery PACK.

[0048] Furthermore, a control cabinet 15 and firefighting equipment 16 are provided in the control cabin 5. The control cabinet 15 is responsible for monitoring and controlling the charging and discharging process of the battery PACK to ensure the safe operation and efficient use of the system. The firefighting equipment 16 mainly uses high-performance fire extinguishing agents and advanced control technology to quickly and efficiently extinguish fires caused by thermal runaway of energy storage batteries.

[0049] Specifically, the control cabinet 15 includes a power distribution unit, a control chassis unit, a status display unit, etc. The power distribution unit mainly provides auxiliary power for the electrical equipment inside the container body 1; the control chassis unit mainly collects and controls the working status and actions of the liquid cooling unit, battery PACK, air conditioner, etc. inside the container body 1, and a suitable controller can be selected according to needs; the status display unit mainly displays the working status of each device inside the container body 1, and a touch display can be used specifically.

[0050] The fire fighting equipment 16 may include a fire fighting gas device and a fire fighting nozzle. The fire fighting gas device and the fire fighting nozzle are connected through a gas pipeline. The fire fighting gas device is used to store fire fighting gas. The fire fighting nozzle is arranged in the battery PACK compartment. The battery PACK compartment may be provided with a fire fighting monitoring module for monitoring whether a fire occurs in the compartment. For example, the fire fighting monitoring module is a characteristic gas sensor or a smoke sensor. The characteristic gas sensor is used to detect the concentration of the thermal runaway characteristic gas in the sealed box. The thermal runaway characteristic gas includes H 2 ,CO,CO 2 , VOC, etc. The fire monitoring module can be electrically connected to the controller of the fire extinguishing gas device and the fire sprinkler.

[0051] The high-voltage direct-mounted flexible energy storage container structure provided by the present invention reduces the floor space, reduces the customer's land cost, and solves the layout problem of the high-voltage direct-mounted flexible energy storage structure; the battery PACKs are connected by copper busbars in cascade mode to improve the reliability of the energy storage system and solve the problem of too many cable connections between the battery PACKs; the liquid cooling unit cabin and the control cabin are isolated by partitions, with electrical gaps, and the high and low voltages are completely independent, which reduces the safety risks of debugging and operation and maintenance, and solves the isolation problem between the high and low voltages; the liquid cooling pipeline is arranged in a bottom-in and top-out layout, and the liquid cooling unit is arranged in a split layout, which reduces pipeline heat loss, improves the system heat dissipation efficiency, and solves the layout problem of the liquid cooling unit and the liquid cooling pipeline.

[0052] The present invention focuses on protecting the structural layout of the high-voltage direct-mounted flexible energy storage container structure, and does not specifically limit the selection of electrical appliances therein, which will not be elaborated here.

[0053] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A high-voltage direct-hanging flexible energy storage container structure, characterized in that: include: A container body (1) and a liquid cooling unit compartment (2), a battery pack compartment (3), a high-voltage compartment (4), and a control compartment (5) divided inside the container body (1); The liquid cooling unit compartment (2) is arranged separately at the leftmost side of the container body (1), and a plurality of liquid cooling units (6) are arranged in the liquid cooling unit compartment (2); The battery PACK compartment (3) is arranged on the right side of the liquid cooling unit compartment (2), a plurality of battery PACKs (9) are arranged in the battery PACK compartment (3), and the battery PACKs (9) are connected to the liquid cooling unit (6) via a liquid cooling pipeline; The high-voltage compartment (4) and the control compartment (5) are both arranged on the right side of the battery PACK compartment (3), and the high-voltage compartment (4) is located above the control compartment (5); the high-voltage compartment (4) and the battery PACK compartment (3) are in communication with each other.

2. The high-voltage direct-hanging flexible energy storage container structure according to claim 1 is characterized in that: The battery PACK (9) is provided with a liquid cooling plate, a liquid cooling channel is provided in the liquid cooling plate, and the liquid cooling channel is connected to the liquid cooling pipeline through a joint.

3. The high-voltage direct-hanging flexible energy storage container structure according to claim 1 is characterized in that: The liquid cooling unit compartment (2) is provided with a mesh door panel.

4. The high-voltage direct-hanging flexible energy storage container structure according to claim 1 is characterized in that: An insulating frame (14) is arranged in the battery PACK compartment (3). The insulating frame (14) is composed of a plurality of insulating profiles assembled together to form a space for placing and fixing a plurality of battery PACKs (9) and is used for electrical isolation between adjacent battery PACKs and between a battery PACK and a container body.

5. The high-voltage direct-hanging flexible energy storage container structure according to claim 1 is characterized in that: The liquid cooling pipeline comprises a water inlet pipeline (7), a water return pipeline (8) and a plurality of liquid cooling pipeline branches. The water inlet pipeline (7) is arranged below all battery PACKs (9), and the water return pipeline (8) is arranged above all battery PACKs (9), forming a bottom-in-top-out structural layout. The plurality of liquid cooling pipeline branches are arranged in parallel between the water pipeline (7) and the water return pipeline (8), and each liquid cooling pipeline branch is provided with a plurality of small branch pipelines, which are respectively connected to the inside of each battery PACK (9).

6. The high-voltage direct-hanging flexible energy storage container structure according to claim 5 is characterized in that: The multiple small branch pipelines on each of the liquid cooling pipeline branches are in a parallel structure.

7. The high-voltage direct-hanging flexible energy storage container structure according to claim 1 is characterized in that: The left bottom of the battery PACK compartment (3) is provided with a wire entry hole (12), and the high-voltage cable passes through the wire entry hole (12) into the battery PACK compartment (3) and is connected to the first battery PACK. The first battery PACK is connected to the second battery PACK via the series copper busbar (10), and the second battery PACK is connected to the third battery PACK via the series copper busbar (10), and so on, all the battery PACKs are connected in series, and the last battery PACK is connected to the high-voltage compartment (4) via the cascade copper busbar (10); The high-voltage compartment (4) is provided with a wire outlet hole (13), and the cascade copper busbar (10) connected to the high-voltage compartment (4) passes through the wire outlet hole (13) through a high-voltage cable and is connected to a power grid outside the container body (1).

8. The high-voltage direct-hanging flexible energy storage container structure according to claim 1 is characterized in that: A transformer (11) is arranged in the high-voltage compartment (4), and the transformer (11) is used to provide auxiliary power for the battery PACK (9).

9. The high-voltage direct-hanging flexible energy storage container structure according to claim 1 is characterized in that: A control cabinet (15) and fire-fighting equipment (16) are arranged in the control cabin (5).

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