Battery cluster liquid cooling system and high-voltage direct-hanging battery converter cabin

Abstract

The utility model relates to the field of storage and play equipment, especially to a battery cluster liquid cooling system and high pressure direct hanging battery converter cabin, liquid cooling system includes liquid cooling unit, and liquid cooling unit is connected through liquid cooling pipeline between battery cluster, and liquid cooling pipeline includes common three stage liquid cooling pipeline, each battery cluster is pairwise set up, in the battery cluster that sets up in pairs, the outlet of three stage liquid cooling pipeline of the battery in the battery cluster that is located in the upstream of liquid cooling pipeline is connected to the inlet of three stage liquid cooling pipeline of the battery in the battery cluster that is located in the downstream of liquid cooling pipeline, and the two battery clusters that set up in pairs are closely arranged under the prerequisite of guaranteeing insulation interval distance. Through pairwise series connection setting of three stage liquid cooling pipeline of battery cluster, the number of the secondary liquid cooling pipeline with larger pipe diameter is reduced, the space occupied by the secondary liquid cooling pipeline is reduced, more battery cluster arrangement space is left, and more battery clusters or battery clusters with larger size and higher capacity can be arranged, thereby the battery energy density in unit space is improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage and discharge equipment, and in particular to a battery cluster liquid cooling system and a high-voltage direct-connected battery converter chamber. Background Technology

[0002] With the increasing demand in the domestic energy storage market and the rapid expansion of the energy storage industry, high-voltage direct-connected energy storage systems have attracted more and more attention from equipment manufacturers and power grid organizations due to their characteristics of low system loss, low on-site construction, and rapid charging and discharging response. As an energy storage unit in a high-voltage direct-connection system, the battery converter compartment's excellent heat dissipation and liquid cooling system not only improves the equipment's operational reliability but also extends battery life and charge / discharge efficiency. For example, Chinese invention patent application CN120033397A discloses a high-voltage direct-connection flexible energy storage container structure, including: a container body and internal compartments for liquid cooling units, a battery pack compartment, a high-voltage compartment, and a control compartment. The liquid cooling unit compartment is located separately on the far left of the container body, housing several liquid cooling units. The battery pack compartment is located to the right of the liquid cooling unit compartment, with multiple battery packs connected to the liquid cooling units via liquid cooling pipes. The high-voltage compartment and the control compartment are both located to the right of the battery pack compartment, with the high-voltage compartment above the control compartment. The high-voltage compartment and the battery pack compartment are interconnected. This invention optimizes space layout, saves floor space, reduces wiring, achieves safe isolation between high-voltage and low-voltage devices, reduces the distance of liquid cooling pipes, and improves heat dissipation efficiency. However, each battery cluster in this energy storage system is supplied with refrigerant through a separate secondary liquid cooling pipeline. This results in each adjacent battery cluster having a secondary liquid cooling inlet pipeline and a secondary liquid cooling outlet pipeline. Since the secondary liquid cooling pipelines are relatively thick, space needs to be left between adjacent battery clusters to accommodate the secondary liquid cooling inlet and outlet pipelines. This leads to a greater distance between adjacent battery clusters, reducing the battery cluster density per unit space and affecting the overall battery energy density within the container. Utility Model Content

[0003] The purpose of this invention is to provide a battery cluster liquid cooling system to solve the technical problem that existing battery cluster units occupy too much battery cluster arrangement space due to the large number of secondary liquid cooling pipes, thus leading to a decrease in battery energy density per unit space. The purpose of this invention is also to provide a high-voltage direct-connected battery converter chamber to solve the technical problem that the liquid cooling system of the existing high-voltage direct-connected battery converter chamber occupies too much battery cluster arrangement space due to the large number of secondary liquid cooling pipes, thus leading to a decrease in battery energy density per unit space.

[0004] To achieve the above objectives, this utility model provides a battery cluster liquid cooling system, including a liquid cooling unit connected to the battery cluster via liquid cooling pipelines. The liquid cooling pipelines include a primary liquid cooling pipeline, a secondary liquid cooling pipeline, and a tertiary liquid cooling pipeline. The primary liquid cooling pipeline includes a primary inlet pipeline and a primary return pipeline. The secondary liquid cooling pipeline is connected in parallel between the primary inlet pipeline and the primary return pipeline. The secondary liquid cooling pipeline includes a secondary inlet pipeline and a secondary return pipeline. The tertiary liquid cooling pipeline is connected in parallel between the secondary inlet pipeline and the secondary return pipeline. The three-stage liquid cooling pipelines are connected to each battery in the battery cluster. The liquid cooling unit, the primary water inlet pipeline, the secondary water inlet pipeline, the tertiary liquid cooling pipeline, the secondary water outlet pipeline, and the primary water outlet pipeline form a circulating cooling loop. Each battery cluster is set up in pairs. In the paired battery clusters, the outlet of the tertiary liquid cooling pipeline of the battery in the battery cluster located upstream of the liquid cooling pipeline is connected in series to the inlet of the tertiary liquid cooling pipeline of the battery in the battery cluster located downstream of the liquid cooling pipeline. The paired battery clusters are arranged closely together while ensuring the insulation distance.

[0005] Furthermore, the secondary outlet pipe corresponding to the secondary inlet pipe connected to the upstream of the primary inlet pipe is connected to the upstream of the primary return pipe, and the secondary outlet pipe corresponding to the secondary inlet pipe connected to the downstream of the primary inlet pipe is connected to the downstream of the primary return pipe, so that the length of the circulating cooling loop formed between the liquid cooling unit and each pair of battery clusters is equal.

[0006] Furthermore, the primary water inlet pipe is arranged below all battery clusters, and the primary water return pipe is arranged above all battery clusters, forming a bottom-in, top-out structural layout.

[0007] Beneficial effects: The battery cluster liquid cooling system in this utility model is an improvement on the existing battery converter chamber liquid cooling system. The liquid cooling pipes of the battery clusters are arranged in pairs in series, which reduces the number of secondary liquid cooling pipes and the space occupied by the secondary liquid cooling pipes. This allows the paired battery clusters to be tightly fitted together, thus leaving more space for battery cluster arrangement. Therefore, more battery clusters or larger and higher capacity battery clusters can be arranged in a unit space, thereby increasing the battery energy density in a unit space.

[0008] To achieve the above objectives, the technical solution of the high-voltage direct-connected battery converter compartment provided by this utility model is as follows: A high-voltage direct-mounted battery converter compartment includes a container. The container houses a battery cluster and a liquid cooling system. The liquid cooling system includes a liquid cooling unit connected to the battery cluster via liquid cooling pipelines. The liquid cooling pipelines include primary, secondary, and tertiary liquid cooling pipelines. The primary liquid cooling pipelines include a primary inlet pipeline and a primary return pipeline. The secondary liquid cooling pipelines are connected in parallel between the primary inlet and return pipelines, and each secondary liquid cooling pipeline includes a secondary inlet pipeline and a secondary return pipeline. The tertiary liquid cooling pipelines are connected in parallel between the secondary inlet and secondary return pipelines. Between the pipelines, the three-stage liquid cooling pipelines are respectively connected to each battery in the battery cluster. The liquid cooling unit, the primary water inlet pipeline, the secondary water inlet pipeline, the tertiary liquid cooling pipeline, the secondary water outlet pipeline, and the primary water outlet pipeline constitute a circulating cooling loop. The feature is that each battery cluster is arranged in pairs. In the paired battery clusters, the outlet of the tertiary liquid cooling pipeline of the battery in the battery cluster located upstream of the liquid cooling pipeline is connected in series to the inlet of the tertiary liquid cooling pipeline of the battery in the battery cluster located downstream of the liquid cooling pipeline. The paired battery clusters are arranged closely together while ensuring the insulation distance.

[0009] Furthermore, the secondary outlet pipe corresponding to the secondary inlet pipe connected to the upstream of the primary inlet pipe is connected to the upstream of the primary return pipe, and the secondary outlet pipe corresponding to the secondary inlet pipe connected to the downstream of the primary inlet pipe is connected to the downstream of the primary return pipe, so that the length of the circulating cooling loop formed between the liquid cooling unit and each pair of battery clusters is equal.

[0010] Furthermore, the primary water inlet pipe is arranged below all battery clusters, and the primary water return pipe is arranged above all battery clusters, forming a bottom-in, top-out structural layout.

[0011] Furthermore, the container is also equipped with a fire protection system and a power distribution system, with the fire control panel of the fire protection system, the power distribution cabinet of the power distribution system, and the liquid cooling unit of the liquid cooling system arranged adjacent to each other.

[0012] Furthermore, the fire control panel, power distribution cabinet, and liquid cooling unit are centrally located at the end of the container along its length.

[0013] Furthermore, partitions are provided between the battery cluster, fire control panel, power distribution cabinet, and liquid cooling unit.

[0014] Furthermore, the liquid cooling unit is located at the end of the container in the width direction. The liquid cooling unit includes an air inlet and an air outlet, which face outwards from the container and are parallel to the length direction of the container.

[0015] Furthermore, an insulating support is provided at the lower end of the battery cluster. The insulating support has an upper connecting end and a lower connecting end. The upper connecting end is connected to the battery cluster, and the lower connecting end is connected to the bottom plate of the container.

[0016] Furthermore, the container is equipped with multiple battery clusters, with adjacent battery clusters spaced apart and insulated spacers between them, and adjacent battery clusters are connected by the insulated spacers.

[0017] Furthermore, the power distribution cabinet is equipped with a switch, and each battery cluster is electrically connected to the switch.

[0018] Furthermore, the container is equipped with doors corresponding to the positions of the battery cluster, fire control panel, power distribution cabinet, and liquid cooling unit.

[0019] Beneficial effects: The high-voltage direct-connected battery converter chamber in this utility model is an improvement on the structure of the existing high-voltage direct-connected battery converter chamber. The specific improvement is the layout of the liquid cooling pipes in the liquid cooling system. The liquid cooling pipes of the battery clusters are arranged in pairs in series, which reduces the number of secondary liquid cooling pipes and reduces the space occupied by the secondary liquid cooling pipes. This allows the paired battery clusters to be closely fitted together, thus leaving more space for battery cluster arrangement. Therefore, more battery clusters or larger and higher capacity battery clusters can be arranged in a unit space, thereby increasing the battery energy density in a unit space. Attached Figure Description

[0020] Figure 1 This is a front view of the battery cluster liquid cooling system of this utility model; Figure 2 This is a partially enlarged view of the battery cluster liquid cooling system of this utility model; Figure 3 This is a top view of the battery cluster liquid cooling system of this utility model; Figure 4 This is a bottom view of the battery cluster liquid cooling system of this utility model; Figure 5 This is a left view of the battery cluster liquid cooling system of this utility model; Figure 6 This is a right view of the battery cluster liquid cooling system of this utility model; Figure 7 This is a schematic diagram of the high-voltage direct-connected battery converter compartment of this utility model; Figure 8 This is a schematic diagram of the hidden cabinet door and top plate of the high-voltage direct-connected battery converter compartment of this utility model; Figure 9 This is a rear view of the hidden cabinet door of the high-voltage direct-connected battery converter compartment of this utility model.

[0021] The components include: 1. Liquid cooling unit; 2. Primary water inlet pipe; 3. Primary water outlet pipe; 4. Secondary water inlet pipe; 5. Tertiary series pipe; 6. Secondary water outlet pipe; 7. Battery cluster. Detailed Implementation

[0022] To address the problems in the background technology, the core concept of this utility model is as follows: by connecting the three-stage liquid cooling pipelines of the battery cluster in pairs in series, the number of secondary liquid cooling pipelines with larger diameters is reduced, the space occupied by the secondary liquid cooling pipelines is reduced, and more space is left for the battery cluster arrangement. In this way, more battery clusters or larger and higher capacity battery clusters can be arranged, thereby improving the battery energy density per unit space.

[0023] The present invention will be further described in detail below with reference to an embodiment of a battery cluster liquid cooling system.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, the battery cluster liquid cooling system of this utility model includes a liquid cooling unit 1, which is connected to the battery cluster 7 via liquid cooling pipes, as follows: Figure 3 and Figure 4As shown, there are twelve battery clusters 7, arranged in two rows, with six battery clusters 7 in each row. Within each row, the battery clusters 7 are arranged in pairs. The liquid cooling system includes primary, secondary, and tertiary liquid cooling systems. The primary liquid cooling system includes a primary inlet pipe 2 and a primary return pipe 3. The secondary liquid cooling system is connected in parallel between the primary inlet pipe 2 and the primary return pipe 3. The secondary liquid cooling system includes a secondary inlet pipe 4 and a secondary return pipe 6. The tertiary liquid cooling system is connected in parallel between the secondary inlet pipe 4 and the secondary return pipe 6. The three-stage liquid cooling pipeline includes a three-stage inlet pipeline, a three-stage series pipeline 5, and a three-stage outlet pipeline. One end of the three-stage inlet pipeline is connected to the two-stage inlet pipeline 4, and the other end is connected to the inlet of the internal liquid cooling pipeline of the upstream battery in the battery cluster 7, which is close to the two-stage inlet pipeline 4. The outlet of the internal liquid cooling pipeline of the upstream battery is connected to the inlet of the internal liquid cooling pipeline of the downstream battery in the battery cluster 7, which is close to the two-stage outlet pipeline 6, through the three-stage series pipeline 5. The outlet of the internal liquid cooling pipeline of the downstream battery is connected to the two-stage outlet pipeline 6 through the three-stage outlet pipeline. The system forms a circulating cooling loop consisting of a liquid cooler unit, a primary water inlet pipe 2, a secondary water inlet pipe 4, a tertiary water inlet pipe, an upstream battery internal liquid cooling pipe, a tertiary series pipe 5, a downstream battery internal liquid cooling pipe, a tertiary water outlet pipe, a secondary water outlet pipe 6, and a primary water outlet pipe 3. Within the paired battery clusters, since adjacent battery clusters are connected by the tertiary series pipe 5, there is no need to install secondary water inlet pipes 4 and 6 between adjacent battery clusters. This allows adjacent battery clusters to be placed as close as possible while maintaining insulation distance, thus saving space occupied by the secondary liquid cooling pipes and allowing more space for battery clusters 7, thereby increasing the battery energy density per unit space. Specifically, the secondary water outlet pipe 6 corresponding to the secondary water inlet pipe 4 connected upstream of the primary water inlet pipe 2 connects to the downstream of the primary return water pipe 3, and the secondary water outlet pipe 6 corresponding to the secondary water inlet pipe 4 connected downstream of the primary water inlet pipe 2 connects to the upstream of the primary return water pipe 3. Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, two primary inlet pipes 2 are connected in parallel, supplying coolant to the front and rear rows of battery clusters 7 respectively. Two secondary return pipes 3 are also connected in parallel, supplying coolant from the front and rear rows of battery clusters 7 back to the liquid cooling unit 1. All primary inlet pipes 2 are located below all battery clusters 7, and all primary return pipes 3 are located above all battery clusters 7, forming a bottom-in, top-out structure. This layout ensures that air bubbles inside the liquid cooling pipes are concentrated inside the primary return pipes 3, facilitating their escape with the liquid flow. This minimizes air in the coolant within the liquid cooling pipes and improves the cooling effect of the liquid cooling system.

[0025] In the above embodiments, the secondary outlet pipe 6 corresponding to the secondary inlet pipe 4 connected to the upstream of the primary inlet pipe 2 is connected to the downstream of the primary return pipe 3, and the secondary outlet pipe 6 corresponding to the secondary inlet pipe 4 connected to the downstream of the primary inlet pipe 2 is connected to the upstream of the primary return pipe 3. In other embodiments, the secondary outlet pipe 6 corresponding to the secondary inlet pipe 4 connected to the upstream of the primary inlet pipe 2 is connected to the upstream of the primary return pipe 3, and the secondary outlet pipe 6 corresponding to the secondary inlet pipe 4 connected to the downstream of the primary inlet pipe 2 is connected to the downstream of the primary return pipe 3. This ensures that the length of the circulating cooling loop formed between the liquid cooling unit and each pair of battery clusters 7 is equal, and that the flow resistance of each parallel circulating cooling loop is the same. This ensures the uniformity of the coolant flow rate in each parallel circulating cooling loop and achieves uniformity of the cooling effect of different battery clusters 7 in the entire system.

[0026] In the above embodiment, there are twelve battery clusters 7, which are arranged in two rows. In other embodiments, the number of battery clusters 7 can be less or more, for example, the number of battery clusters 7 can be six or eighteen, with six battery clusters 7 arranged in a single row or eighteen battery clusters 7 arranged in three rows.

[0027] In the above embodiments, in each row of battery clusters 7, the battery clusters 7 are connected in pairs in series. In other embodiments, in each row of battery clusters 7, more battery clusters 7 are connected in series to form a group. For example, three, four, five or six battery clusters 7 can be connected together through series pipelines to further shorten the length of the secondary liquid cooling pipeline.

[0028] In the above embodiment, the primary water inlet pipe 2 is arranged below the battery cluster 7, and the primary water return pipe 3 is arranged above the battery cluster 7, forming a bottom-inlet and top-outlet structural layout. In other embodiments, the primary water inlet pipe 2 is arranged above the battery cluster 7, and the primary water return pipe 3 is arranged below the battery cluster 7.

[0029] The present invention will be further described in detail below with reference to an embodiment of a high-voltage direct-connected battery converter compartment.

[0030] like Figure 7 , Figure 8 and Figure 9As shown, the high-voltage direct-mounted battery converter compartment of this utility model includes a container, which houses a battery system, a fire protection system, a power distribution system, and a liquid cooling system. Five supporting columns are provided on both the front and rear side panels of the container, with the five front supporting columns on the front panel corresponding one-to-one with the five rear supporting columns on the rear panel. A first partition is provided between the second front supporting column and the second rear supporting column from the left, dividing the container into left and right chambers. The left chamber is used to install the main units of the fire protection system, power distribution system, and liquid cooling system, while the right chamber is used to install the battery system. By centralizing all the supporting systems of the battery system together, the internal layout of the container is optimized, and space utilization is improved. In the left and right chambers, a second partition parallel to the front side panel of the container is provided in the middle along the width direction of the left chamber, dividing the left chamber into a left front chamber and a left rear chamber. The left front chamber houses the fire protection main unit and the power distribution cabinet, while the left rear chamber houses the liquid cooling unit 1. The second partition further divides the supporting system area, forming a modular design that improves the assembly efficiency of the high-voltage direct-connected battery converter compartment before it leaves the factory and the convenience of maintenance during later use.

[0031] The battery system consists of twelve battery clusters 7, arranged in two rows along the width of the container, with six clusters in each row. Each battery cluster 7 has an insulating support at its lower end, with an upper connecting end connected to the bottom of the cluster and a lower connecting end connected to the container floor. This provides insulating support, ensuring a certain height between the bottom of the battery cluster 7 and the container floor, maintaining an insulating distance between them. Furthermore, adjacent battery clusters 7 are spaced apart by insulating spacers, which connect them to ensure a safe insulating distance between each cluster. The specific internal structure of the battery cluster 7 is existing technology and will not be described further here.

[0032] The fire protection system can adopt the existing configuration of fire protection systems within battery converter compartments, such as an automatic gas fire extinguishing system consisting of a fire control panel, fire detectors, a perfluorohexanone gas cabinet, and gas extinguishing nozzles. This part of the structure is existing technology and will not be described in detail here.

[0033] The power distribution system's distribution cabinet is equipped with a switch. Multiple optical fibers from each battery cluster 7 are aggregated through the switch in the distribution cabinet, and finally, a single optical fiber is output from the switch to connect to the upstream unit. This setup reduces the amount of optical fiber used in the equipment, lowers the manufacturing cost of the high-voltage direct-connected battery converter compartment, and reduces on-site construction work. Other structural features of the power distribution system are existing technologies and will not be described in detail here.

[0034] like Figure 7 , Figure 8 and Figure 9As shown, the liquid cooling system includes two liquid cooling units 1 arranged side-by-side in the left rear chamber. Each liquid cooling unit 1 includes an air inlet and an air outlet, both facing left. The liquid cooling system includes the liquid cooling units 1, which are connected to the battery cluster 7 via liquid cooling pipes. Figure 3 and Figure 4 As shown, there are twelve battery clusters 7, arranged in two rows, with six battery clusters 7 in each row. Within each row, the battery clusters 7 are arranged in pairs. The liquid cooling system includes primary, secondary, and tertiary liquid cooling systems. The primary liquid cooling system includes a primary inlet pipe 2 and a primary return pipe 3. The secondary liquid cooling system is connected in parallel between the primary inlet pipe 2 and the primary return pipe 3. The secondary liquid cooling system includes a secondary inlet pipe 4 and a secondary return pipe 6. The tertiary liquid cooling system is connected in parallel between the secondary inlet pipe 4 and the secondary return pipe 6. The three-stage liquid cooling system includes a three-stage inlet pipe, a three-stage series pipe 5, and a three-stage outlet pipe. One end of the three-stage inlet pipe is connected to the two-stage inlet pipe 4, and the other end is connected to the inlet of the internal liquid cooling pipe of the upstream battery in the battery cluster 7, which is close to the two-stage inlet pipe 4. The outlet of the internal liquid cooling pipe of the upstream battery is connected to the inlet of the internal liquid cooling pipe of the downstream battery in the battery cluster 7, which is close to the two-stage outlet pipe 6, through the three-stage series pipe 5. The outlet of the internal liquid cooling pipe of the downstream battery is connected to the two-stage outlet pipe 6 through the three-stage outlet pipe. This forms a circulating cooling loop consisting of the liquid cooling unit, the first-stage inlet pipe 2, the second-stage inlet pipe 4, the three-stage inlet pipe, the internal liquid cooling pipe of the upstream battery, the three-stage series pipe 5, the internal liquid cooling pipe of the downstream battery, the three-stage outlet pipe, the two-stage outlet pipe 6, and the first-stage outlet pipe 3. Specifically, the secondary outlet pipe 6, corresponding to the secondary inlet pipe 4 connected upstream of the primary inlet pipe 2, is connected downstream of the primary return pipe 3; conversely, the secondary outlet pipe 6, corresponding to the secondary inlet pipe 4 connected downstream of the primary inlet pipe 2, is connected upstream of the primary return pipe 3. This simplifies the liquid cooling pipe design and shortens the total length of the liquid cooling pipes. Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, two primary inlet pipes 2 are connected in parallel, supplying coolant to the front and rear rows of battery clusters 7 respectively. Two secondary return pipes 3 are also connected in parallel, supplying coolant from the front and rear rows of battery clusters 7 back to the liquid cooling unit 1. All primary inlet pipes 2 are located below all battery clusters 7, and all primary return pipes 3 are located above all battery clusters 7, forming a bottom-in, top-out structure. This layout ensures that air bubbles inside the liquid cooling pipes are concentrated inside the primary return pipes 3, facilitating their escape with the liquid flow. This minimizes air in the coolant within the liquid cooling pipes and improves the cooling effect of the liquid cooling system.

[0035] like Figure 7 As shown, doors are installed between adjacent front support columns on the front panel of the container to facilitate the installation and subsequent maintenance of the liquid cooling system, power distribution system, fire protection system, and battery system. Figure 7 As shown, a double-opening grille door is provided on the left side panel of the container corresponding to the left rear chamber, so as to keep the air inlet and outlet ducts of the liquid cooling unit 1 unobstructed and facilitate installation and maintenance.

[0036] In this embodiment, the voltage level of the high-voltage direct-connected battery converter compartment is 35kV.

[0037] In the above embodiments, a second partition is provided only in the left chamber to divide the left chamber into a left front chamber and a left rear chamber. In other embodiments, a third partition is provided in the left front chamber, parallel to the left side panel of the container. The third partition divides the left front chamber into a left power distribution chamber and a right fire protection chamber, which are used to install the power distribution cabinet and the fire control panel, respectively.

[0038] In the above embodiments, the fire protection system, power distribution system, and liquid cooling system are located at the ends of the container along its length. In other embodiments, the fire protection system, power distribution system, and liquid cooling system may also be located in the middle of the container along its length.

[0039] In the above embodiments, the battery clusters 7 are provided with twelve groups, and the liquid cooling units 1 are provided with two groups. In other embodiments, the number of battery clusters 7 can be flexibly adjusted according to the actual capacity requirements, for example, it can be 6 groups or 18 groups, and the corresponding number of liquid cooling units 1 can also be set to 1 group or 3 groups, etc.

[0040] In the above embodiment, the air outlet of the liquid cooling unit 1 is set to the left, while in other embodiments, the air outlet can be set to the top, and an external pipe is connected to the air outlet to guide the air out of the air outlet to a position away from the air inlet.

[0041] In the above embodiments, the air outlet and air inlet of the liquid cooling unit 1 are both arranged to the left, and a corresponding opening is made on the left side panel of the container. In other embodiments, the air outlet and air inlet of the liquid cooling unit 1 are both arranged to the rear, and a corresponding opening is made on the rear side panel of the container.

[0042] In the above embodiment, the voltage level of the high-voltage direct-connected battery converter compartment is 35kV. In other embodiments, the voltage level of the high-voltage direct-connected battery converter compartment can also be 40.5kV, 52kV, 72.5kV, 126kV, etc. In this case, different insulation support heights, insulation spacer widths, and distances between the battery cluster 7 and the inner wall of the container can be set according to different voltage levels to ensure the insulation safety of the battery system.

[0043] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some technical features, or organically combine different types of specific implementation methods to create the specific implementation methods shown in the accompanying drawings. Of course, those skilled in the art can also create other specific implementation methods not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery cluster liquid cooling system, comprising a liquid cooling unit connected to the battery cluster via liquid cooling pipelines, the liquid cooling pipelines including a primary liquid cooling pipeline, a secondary liquid cooling pipeline, and a tertiary liquid cooling pipeline, the primary liquid cooling pipeline including a primary inlet pipeline and a primary return pipeline, the secondary liquid cooling pipelines being connected in parallel between the primary inlet pipeline and the primary return pipeline, the secondary liquid cooling pipelines including a secondary inlet pipeline and a secondary return pipeline, the tertiary liquid cooling pipelines being connected in parallel between the secondary inlet pipeline and the secondary return pipeline, the tertiary liquid cooling pipelines being respectively connected to each battery within the battery cluster, the liquid cooling unit, the primary inlet pipeline, the secondary inlet pipeline, the tertiary liquid cooling pipeline, the secondary outlet pipeline, and the primary outlet pipeline forming a circulating cooling loop, characterized in that: Each battery cluster is arranged in pairs. Within each pair of battery clusters, the outlet of the tertiary liquid cooling pipeline of the battery in the upstream battery cluster is connected in series to the inlet of the tertiary liquid cooling pipeline of the battery in the downstream battery cluster. The two battery clusters in pairs are arranged closely together while ensuring the insulation distance.

2. The battery cluster liquid cooling system according to claim 1, characterized in that: The secondary outlet pipe corresponding to the secondary inlet pipe connected to the upstream of the primary inlet pipe is connected to the upstream of the primary return pipe, and the secondary outlet pipe corresponding to the secondary inlet pipe connected to the downstream of the primary inlet pipe is connected to the downstream of the primary return pipe, so that the length of the circulating cooling loop formed between the liquid cooler unit and each pair of battery clusters is equal.

3. The battery cluster liquid cooling system according to claim 2, characterized in that: The primary water inlet pipe is located below all battery clusters, and the primary water return pipe is located above all battery clusters, forming a bottom-in, top-out structural layout.

4. A high-voltage direct-connected battery converter compartment, comprising a container, wherein a battery cluster and a liquid cooling system are disposed within the container, the liquid cooling system comprising a liquid cooling unit, the liquid cooling unit being connected to the battery cluster via liquid cooling pipelines, the liquid cooling pipelines comprising primary liquid cooling pipelines, secondary liquid cooling pipelines and tertiary liquid cooling pipelines, the primary liquid cooling pipelines comprising a primary inlet pipeline and a primary return pipeline, the secondary liquid cooling pipelines being arranged in parallel between the primary inlet pipeline and the primary return pipeline, the secondary liquid cooling pipelines comprising a secondary inlet pipeline and a secondary return pipeline, the tertiary liquid cooling pipelines being arranged in parallel between the secondary inlet pipeline and the secondary return pipeline, the tertiary liquid cooling pipelines being respectively connected to each battery within the battery cluster, the liquid cooling unit, the primary inlet pipeline, the secondary inlet pipeline, the tertiary liquid cooling pipelines, the secondary outlet pipeline, and the primary outlet pipeline forming a circulating cooling loop, characterized in that: Each battery cluster is arranged in pairs. Within each pair of battery clusters, the outlet of the tertiary liquid cooling pipeline of the battery in the upstream battery cluster is connected in series to the inlet of the tertiary liquid cooling pipeline of the battery in the downstream battery cluster. The two battery clusters in pairs are arranged closely together while ensuring the insulation distance.

5. The high-voltage direct-connected battery converter compartment according to claim 4, characterized in that: The secondary outlet pipe corresponding to the secondary inlet pipe connected to the upstream of the primary inlet pipe is connected to the upstream of the primary return pipe, and the secondary outlet pipe corresponding to the secondary inlet pipe connected to the downstream of the primary inlet pipe is connected to the downstream of the primary return pipe, so that the length of the circulating cooling loop formed between the liquid cooler unit and each pair of battery clusters is equal.

6. The high-voltage direct-connected battery converter compartment according to claim 5, characterized in that: The primary water inlet pipe is located below all battery clusters, and the primary water return pipe is located above all battery clusters, forming a bottom-in, top-out structural layout.

7. The high-voltage direct-connected battery converter compartment according to claim 6, characterized in that: The container is also equipped with a fire protection system and a power distribution system. The fire control panel of the fire protection system, the power distribution cabinet of the power distribution system, and the liquid cooling unit of the liquid cooling system are arranged adjacent to each other.

8. The high-voltage direct-connected battery converter compartment according to claim 7, characterized in that: The fire control panel, power distribution cabinet, and liquid cooling unit are centrally located at the end of the container along its length.

9. The high-voltage direct-connected battery converter compartment according to claim 8, characterized in that: Partitions are installed between the battery clusters, fire control panel, power distribution cabinet, and liquid cooling unit.

10. The high-voltage direct-connected battery converter compartment according to claim 9, characterized in that: The liquid cooling unit is located at the end of the container in the width direction. The liquid cooling unit includes an air inlet and an air outlet, which face the outside of the container and are parallel to the length direction of the container.

11. The high-voltage direct-connected battery converter compartment according to any one of claims 4 to 10, characterized in that: An insulating support is provided at the lower end of the battery cluster. The insulating support has an upper connecting end and a lower connecting end. The upper connecting end is connected to the battery cluster, and the lower connecting end is connected to the bottom plate of the container.

12. The high-voltage direct-connected battery converter compartment according to any one of claims 4 to 10, characterized in that: The container contains multiple battery clusters, with adjacent battery clusters spaced apart and separated by insulating spacers. The adjacent battery clusters are connected by the insulating spacers.

13. The high-voltage direct-connected battery converter compartment according to any one of claims 7 to 10, characterized in that: The power distribution cabinet is equipped with a switch, and each battery cluster is electrically connected to the switch.

14. The high-voltage direct-connected battery converter compartment according to any one of claims 7 to 10, characterized in that: The container is equipped with doors corresponding to the locations of the battery cluster, fire control panel, power distribution cabinet, and liquid cooling unit.

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