An integrated energy storage plant

Abstract

The utility model relates to battery energy storage equipment manufacturing technical field especially, and a kind of integrated energy storage equipment, including one energy storage cabinet, M battery clusters and M liquid cooling units. M containing sub-cavities are provided in energy storage cabinet. And each containing sub-cavity is formed by physical partition to form independent isolated space. Battery cluster is combined by N battery packs in series, and it is housed in containing sub-cavity. Each battery cluster is correspondingly configured with independent liquid cooling unit, to achieve one-to-one thermal management mode design purpose, in this way, on the one hand, avoid the problem of uneven cooling liquid temperature caused by too long liquid cooling pipeline, benefit to the independent and accurate working temperature control of each battery cluster;On the other hand, according to the real-time heating condition of corresponding battery cluster, cooling liquid flow and circulation speed can be flexibly adjusted;On the other hand, each battery cluster is independent and the liquid cooling unit is independent, by increasing or decreasing battery cluster number, the capacity of energy storage equipment can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of battery energy storage equipment manufacturing technology, and in particular to an integrated energy storage equipment. Background Technology

[0002] Energy storage equipment, with battery packs as its core energy source, serves as a crucial carrier for energy storage and release within new energy systems, and is widely used in areas such as power peak shaving, renewable energy consumption, and distributed energy systems. It is known that battery packs are extremely sensitive to operating temperature; excessively high temperatures can not only lead to decreased battery performance and shortened lifespan but may also trigger serious safety accidents such as thermal runaway. Therefore, an efficient thermal management system has become a key technological bottleneck in the development of energy storage equipment.

[0003] Currently, traditional energy storage equipment primarily employs centralized liquid cooling solutions for thermal management, using a single liquid cooling system to control multiple battery packs simultaneously. However, this approach suffers from several drawbacks: firstly, uneven coolant temperature is highly susceptible to occur during long-distance transmission through the liquid cooling pipelines, making temperature control accuracy difficult to guarantee and consequently reducing the energy utilization rate of the battery packs; secondly, the complex pipeline layout and system architecture result in high manufacturing costs and significant maintenance challenges. Furthermore, different application scenarios have significantly varying capacity requirements for energy storage equipment, ranging from the miniaturized needs of residential energy storage to the large-scale demands of grid-scale energy storage. Traditional energy storage equipment often requires customized systems for different customers, increasing R&D and production costs and extending product delivery cycles. Therefore, it is imperative for technical personnel to address these issues. Utility Model Content

[0004] Therefore, in view of the above-mentioned existing problems and defects, the designers of this utility model collected relevant information, conducted multiple evaluations and considerations, and carried out continuous experiments and modifications by technical personnel with many years of R&D experience in this industry, which ultimately led to the emergence of this integrated energy storage equipment.

[0005] This utility model relates to an integrated energy storage device, including an energy storage cabinet, M battery clusters, and M liquid cooling units. The energy storage cabinet has M receiving cavities inside, and each receiving cavity is physically separated to form an independent isolated space. Each battery cluster is composed of N battery packs connected in series and is housed within a receiving cavity. Each battery cluster is equipped with an independent liquid cooling unit, which is also housed within a receiving cavity.

[0006] As a further improvement to the technical solution disclosed in this utility model, the liquid cooling unit includes:

[0007] A liquid cooling chamber for holding coolant;

[0008] A liquid-cooled piping assembly connected to a liquid-cooled chamber, allowing the coolant to circulate.

[0009] A circulation pump, installed in the loop of the liquid-cooled piping assembly, is used to drive the circulation of coolant;

[0010] A radiator, installed in the loop of the liquid cooling pipe assembly, is used to dissipate heat from the coolant;

[0011] There are N heat exchange seats, each of which is adapted to a single battery pack. The heat exchange seats are connected to the liquid cooling pipe assembly, and the coolant can flow through the heat exchange seats to dissipate the heat generated by the battery pack.

[0012] As a further improvement to the technical solution disclosed in this utility model, a cold water flow channel is provided inside the heat exchange base. Furthermore, the cold water flow channel is distributed in a tortuous manner within the heat exchange base.

[0013] As a further improvement to the technical solution disclosed in this utility model, the heat exchange seat is made of a material with high thermal conductivity. Before performing the battery pack placement operation, a layer of thermally conductive silicone grease is pre-formed on the contact surface of the heat exchange seat.

[0014] As a further improvement to the technical solution disclosed in this utility model, the liquid-cooled pipeline assembly includes a main pipeline and N branch pipelines. The main pipeline is directly connected to the liquid-cooled chamber. Each branch pipeline is connected to a heat exchange base in a corresponding manner.

[0015] As a further improvement to the technical solution disclosed in this utility model, the liquid cooling unit also includes N temperature sensors and N flow regulating valves. The temperature sensors are all built into the receiving sub-cavities and are aligned directly with the battery pack. Each branch pipe is equipped with a flow regulating valve.

[0016] As a further improvement to the technical solution disclosed in this utility model, the liquid cooling unit also includes a forced commutation unit. The forced commutation unit includes an intake fan and an exhaust fan. The intake fan and the exhaust fan are respectively embedded in the front and rear side walls of the energy storage cabinet, and are directly opposite the heat sink.

[0017] In practical applications, the integrated energy storage equipment disclosed in this utility model can achieve at least the following beneficial technical effects, specifically:

[0018] 1) Each battery cluster is equipped with an independent liquid cooling unit, and the liquid cooling unit and the battery cluster are housed in an independent receiving cavity, thus achieving the design purpose of a one-to-one thermal management mode. On the one hand, compared with the traditional centralized liquid cooling solution, it can avoid the problem of uneven coolant temperature caused by excessively long liquid cooling pipes, which is conducive to independent and precise control of the operating temperature of each battery cluster. On the other hand, the independent liquid cooling unit can flexibly adjust the coolant flow rate and circulation speed according to the real-time heat generation of the corresponding battery cluster, thereby ensuring that the battery cluster is always in the optimal operating temperature range, thus improving the energy utilization rate and service life of the integrated energy storage equipment.

[0019] 2) Each containment chamber is physically separated to form an independent isolation space. This effectively prevents heat conduction and thermal runaway from spreading between battery clusters. Even if a battery cluster experiences abnormal high temperature or thermal runaway, the independent containment chamber can limit the impact of the accident to a single containment chamber.

[0020] 3) Thanks to the independence of each battery cluster and the independent liquid cooling unit, when the user's energy storage capacity demand changes, the capacity of the energy storage equipment can be flexibly adjusted by increasing or decreasing the number of battery clusters, without the need for large-scale modification of the entire integrated energy storage equipment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a front view of the integrated energy storage equipment disclosed in this utility model (with the energy storage cabinet door hidden).

[0023] Figure 2 This is a three-dimensional schematic diagram of the integrated energy storage equipment disclosed in this utility model (with the energy storage cabinet hidden).

[0024] Figure 3 This is a schematic diagram showing the state of the battery pack relative to the heat exchange seat in the integrated energy storage equipment disclosed in this utility model.

[0025] Figure 4 This is a front view of the integrated energy storage equipment disclosed in this utility model.

[0026] Figure 5 This is a rear view of the integrated energy storage equipment disclosed in this utility model.

[0027] 1-Energy storage cabinet; 2-Battery cluster; 21-Battery pack; 3-Liquid cooling unit; 31-Liquid cooling chamber; 32-Liquid cooling pipe assembly; 321-Main pipe; 322-Branch pipe; 33-Heat exchange base; 331-Water injection connector; 332-Drainage connector; 34-Forced commutation unit; 341-Axial flow intake fan; 342-Axial flow exhaust fan. Detailed Implementation

[0028] In the description of this utility model, it should be understood that the terms "left", "right", "front", "back", "up", "down", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0029] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 , Figure 4 , Figure 5 The diagram shows the structure of the integrated energy storage equipment disclosed in this utility model. It includes an energy storage cabinet 1, two battery clusters 2, and two liquid cooling units 3. Each battery cluster 2 is composed of multiple battery packs 21 connected in series. The energy storage cabinet 1 has internal physical partitions to form independently isolated left and right receiving sub-cavities. Both the left and right receiving sub-cavities can independently house the battery clusters 2. Each battery cluster 2 is equipped with an independent liquid cooling unit 3. Both the left and right receiving sub-cavities house liquid cooling units 3. When the liquid cooling unit 3 corresponding to a certain battery cluster 2 fails, it will not affect the heat dissipation of other battery clusters 2, thereby effectively reducing the scope of the failure.

[0030] By adopting the above technical solution, on the one hand, compared with the traditional centralized liquid cooling solution, the problem of uneven coolant temperature is effectively solved, which is conducive to independent and precise control of the working temperature of each battery cluster 3; on the other hand, the independent liquid cooling unit 3 can flexibly adjust the coolant flow rate and circulation speed according to the real-time heating status of the corresponding battery cluster 2, thereby ensuring that the battery cluster 2 is always in the optimal working temperature range, thus improving the energy utilization rate and service life of the integrated energy storage equipment.

[0031] Here, the following two points also need to be explained: 1) Thanks to the independent isolation space formed by the physical separation between the left and right accommodating sub-cavities, heat conduction and thermal runaway propagation between battery clusters 2 are effectively blocked. Even if a battery cluster 2 experiences abnormal high temperature or thermal runaway, the scope of the accident can be limited to a specific space; 2) When the user's energy storage capacity demand changes, the capacity of the energy storage equipment can be flexibly adjusted by increasing or decreasing the number of battery clusters 2. The idle liquid cooling unit 3 remains unchanged, without the need for large-scale modification of the entire integrated energy storage equipment.

[0032] like Figure 2 As shown, each liquid-cooled cooling unit 3 includes a liquid-cooled chamber 31, a liquid-cooled pipe assembly 32, a circulation pump (not shown), a radiator (not shown), and multiple heat exchange seats 33. The liquid-cooled chamber 31 contains the coolant. The liquid-cooled pipe assembly 32, composed of multiple liquid-cooled pipes, is connected to the liquid-cooled chamber 31, allowing the coolant to circulate. The circulation pump is located in the circuit of the liquid-cooled pipe assembly 32 to drive the coolant circulation. The radiator is located in the circuit of the liquid-cooled pipe assembly 32 to dissipate heat from the coolant. Each heat exchange seat 33 is adapted to a single battery pack 21 (e.g., ...). Figure 3 As shown in the diagram, the heat exchange seat is connected to the liquid cooling pipe assembly 32, and the coolant can flow through the heat exchange seat 33, so that the heat generated by the battery pack 21 can be dissipated.

[0033] In actual operation, the heat exchange seat 33 is in close contact with the battery pack 21 and is connected to the liquid cooling pipe assembly 32, so that the heat generated by the battery pack 21 can be dissipated quickly, ensuring that the operating temperature of the battery pack 21 is always maintained within a reasonable range.

[0034] It should also be noted that the circulating pump is preferably a servo pump, whose output power can be adjusted as needed. When the battery pack 21 generates a large amount of heat, the output power of the circulating pump is increased, increasing the coolant flow rate and accelerating heat dissipation. Conversely, when the battery pack 21 generates less heat, the output power of the circulating pump is reduced to save energy. Simultaneously, the radiator is located in the loop of the liquid cooling pipe assembly 32, enabling rapid cooling of the coolant after heat absorption, ensuring that the coolant maintains a consistently low temperature and guaranteeing continuous and efficient heat dissipation.

[0035] As a further refinement of the above technical solution, the heat exchange base 33 is provided with a cold water circulation channel, and is equipped with both a water inlet connector 331 and a drain connector 332 (e.g., Figure 3 (As shown in the diagram). Water inlet connector 331 and drain connector 332 are simultaneously connected to the liquid cooling pipe assembly 32, and the coolant continuously flows through the heat exchange seat 33 under the action of pumping force.

[0036] In order to improve heat exchange efficiency and accelerate the heat dissipation of battery pack 21, as a further optimization of the above technical solution, the cold water flow channel is distributed in a tortuous manner within the heat exchange seat 33.

[0037] As a further optimization of the above technical solution, the heat exchange base 33 is made of a highly thermally conductive material, such as pure copper or a copper alloy, to quickly transfer the heat generated by the battery pack 21 to the interior of the heat exchange base 33. Before performing the battery pack 21 placement operation, a thermally conductive silicone grease layer (not shown in the figure) is pre-formed on the contact surface of the heat exchange base 33 to fill the air gap formed between the contact surfaces of the battery pack 21 and the heat exchange base 33, thereby facilitating the rapid and efficient transfer of heat from the battery pack 21 to the heat exchange base 33, ensuring that the operating heat of the battery pack 21 is quickly dissipated.

[0038] As shown in Figure 2, the liquid-cooled pipe assembly 32 includes a main pipe 321 and multiple branch pipes 322. The main pipe 321 is directly connected to the liquid-cooled chamber 31. Each branch pipe 322 is connected to a heat exchange seat 33. In this way, during actual operation, the main pipe 321 serves as the main channel for coolant circulation, enabling stable and high-capacity coolant delivery. Through the branch pipes 322, the coolant flows directly and independently to each heat exchange seat 33. With the assistance of adjusting the output power of the circulation pump, the coolant flow rate into the corresponding heat exchange seat 33 can be precisely adjusted according to the actual heat generation of different battery packs 21.

[0039] Furthermore, as a further optimization of the above technical solution, the liquid cooling unit 3 is also equipped with multiple temperature sensors and multiple flow regulating valves (not shown in the figure). The temperature sensors are all built into the receiving sub-cavities (including left and right receiving sub-cavities), and are aligned directly with the battery pack 21. Each branch pipe 322 is equipped with a flow regulating valve. Thus, on the one hand, because each branch pipe 322 is independently equipped with a flow regulating valve, and combined with the real-time temperature data fed back by the temperature sensors, it is convenient to flexibly adjust the operating conditions of the liquid cooling unit 3; on the other hand, it provides a reliable basis for subsequent heat dissipation control, enabling the liquid cooling unit 3 to respond promptly to the heat dissipation needs of the battery pack 21, effectively preventing irreversible damage caused by excessive operating temperature.

[0040] like Figure 4 , Figure 5As shown, the liquid cooling unit 3 is also equipped with a forced commutation unit 34. The forced commutation unit 34 includes an axial inlet fan 341 and an axial outlet fan 342. The axial inlet fan 341 and the axial outlet fan 342 are respectively embedded in the front and rear side walls of the energy storage cabinet 1, and are directly opposite the radiator. In actual operation, the axial inlet fan 341 quickly introduces cold air from the outside into the energy storage cabinet 1 and acts directly on the surface of the radiator, while the axial outlet fan 342 simultaneously and quickly exhausts the hot air after absorbing heat outside the cabinet, forming a strong air convection circulation. Compared with natural convection cooling, the directional and high-speed airflow generated by forced commutation significantly accelerates the airflow velocity on the surface of the radiator, and the heat dissipation efficiency of the radiator is greatly improved, ensuring that the coolant flows back to the liquid cooling pipe assembly 32 at a lower temperature, which lays a good foundation for the continuous and efficient heat dissipation of the battery pack 21.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated energy storage device, comprising an energy storage cabinet, M battery clusters, and M liquid cooling units; the energy storage cabinet has M receiving sub-cavities inside; and each receiving sub-cavity is physically separated to form an independent isolated space; the battery cluster is composed of N battery packs connected in series and is housed in the receiving sub-cavities; each battery cluster is correspondingly equipped with an independent liquid cooling unit; and the liquid cooling unit is also housed in the receiving sub-cavities.

2. The integrated energy storage equipment according to claim 1, characterized in that, The liquid cooling unit includes: A liquid cooling chamber for holding coolant; A liquid-cooled pipe assembly is connected to the liquid-cooled chamber, allowing the coolant to circulate. A circulation pump is installed in the loop of the liquid-cooled pipe assembly to drive the coolant circulation flow; A radiator is installed in the loop of the liquid cooling pipe assembly to dissipate heat from the coolant; N heat exchange seats, each heat exchange seat is adapted to a single battery pack, the heat exchange seats are connected to the liquid cooling pipe assembly, the coolant can flow through the heat exchange seats, and the heat generated by the battery pack can be dissipated.

3. The integrated energy storage equipment according to claim 2, characterized in that, The heat exchange seat is provided with a cold water circulation channel; and the cold water circulation channel is distributed in a tortuous manner within the heat exchange seat.

4. The integrated energy storage equipment according to claim 2, characterized in that, The heat exchange seat is made of a highly thermally conductive material; before the battery pack is placed, a thermally conductive silicone grease layer is pre-formed on the contact surface of the heat exchange seat.

5. The integrated energy storage equipment according to claim 2, characterized in that, The liquid cooling pipeline assembly includes a main pipeline and N branch pipelines; the main pipeline is directly connected to the liquid cooling chamber; each of the branch pipelines is connected to the heat exchange base in a corresponding manner.

6. The integrated energy storage equipment according to claim 5, characterized in that, The liquid cooling unit also includes N temperature sensors and N flow regulating valves; the temperature sensors are all built into the receiving sub-cavities and are aligned with the battery pack one by one; each of the branch pipes is equipped with a flow regulating valve.

7. The integrated energy storage equipment according to any one of claims 2-6, characterized in that, The liquid cooling unit also includes a forced commutation unit; the forced commutation unit includes an intake fan and an exhaust fan; the intake fan and the exhaust fan are respectively embedded in the front and rear side walls of the energy storage cabinet and are directly opposite the radiator.

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