Energy storage system

Abstract

The utility model discloses an energy storage system to solve the problems that an existing energy storage system is poor in compatibility and uneven in temperature control. The device comprises a box body, a cooling system chamber, an electrical control chamber and a plurality of battery chambers are arranged in the box body, a plurality of battery clusters and a plurality of groups of cooling water pipes are mounted in each battery chamber, and a control cabinet system is correspondingly connected with a confluence incoming cabinet system, a fire-fighting spraying device and a cooling water machine; the container is reasonable in structural design, a single set of high-power and high-flow liquid cooling unit is split and designed into a plurality of small cooling water machines with different powers, aiming at energy storage systems with different power sections, a design scheme that a single container is compatible with various different charge-discharge multiplying powers is realized, and product serialization is easier to realize; through the design scheme of one cluster and one temperature control, adjacent battery clusters do not interfere with each other, more accurate temperature control is realized, and the temperature difference between the battery clusters is reduced.

Description

Technical Field

[0001] This application relates to the field of electrochemical energy storage technology, specifically to an energy storage system. Background Technology

[0002] In recent years, energy storage technology has developed rapidly in various industries, with single-unit power density increasing. Currently, the mainstream capacity of a single container can reach 5MWh. In large-scale energy storage system solutions, most use a single high-power, high-flow liquid-cooled unit to centrally cool the batteries in the entire container, with a battery charge / discharge rate of 0.5C. In thermal energy storage frequency regulation applications, the typical demand is for high-rate 1C charge / discharge, which a single high-power, high-flow liquid-cooled unit can no longer meet the system's requirements. Developing high-power liquid-cooled units is also not feasible for use in standard containers.

[0003] In existing energy storage systems, the containerized structure of centralized cooling solutions makes the energy storage container system incompatible with multi-power segment designs. At the same time, the use of centralized cooling results in large temperature differences between energy storage clusters and uneven system temperature control. If the cooling water turbine fails, the entire system needs to be shut down for maintenance. Utility Model Content

[0004] Therefore, this application provides an energy storage system to solve the problems of poor compatibility and uneven temperature control in existing energy storage systems.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] An energy storage system includes a housing, the interior of which is provided a cooling system compartment at the top and an electrical control compartment and a plurality of battery compartments arranged sequentially along the length of the lower part, wherein the cooling system compartment corresponds to the upper area of ​​the plurality of battery compartments;

[0007] Each of the battery compartments is equipped with multiple battery clusters and multiple sets of cooling water pipes corresponding to each battery cluster. Each set of cooling water pipes includes a first cooling water pipe and a second cooling water pipe. The cooling system compartment is equipped with multiple cooling water machines, each corresponding to one of the battery clusters. The outlet of each cooling water machine is connected to the coolant inlet of a battery cluster through the first cooling water pipe, and the inlet of each cooling water machine is connected to the coolant outlet of a battery cluster through the second cooling water pipe.

[0008] The electrical control compartment is equipped with a control cabinet system, a busbar cabinet system, and a fire sprinkler system. The control cabinet system is connected to the busbar cabinet system, the fire sprinkler system, and the cooling water machine, respectively.

[0009] Optionally, multiple battery clusters are arranged sequentially along the length of the housing, each battery cluster including multiple battery packs, and the multiple battery packs are arranged sequentially along the height of the housing.

[0010] Optionally, the battery cluster is a lithium iron phosphate battery cluster;

[0011] Each battery cluster has a high-voltage box at its bottom.

[0012] Optionally, the battery compartment is equipped with smoke detectors and heat detectors, which are respectively connected to the control cabinet system.

[0013] Optionally, the temperature difference between adjacent battery clusters is less than 2°C.

[0014] Optionally, each of the aforementioned cooling water machines is provided with an air guide duct at the front.

[0015] Optionally, the electrical control compartment is located on the far right of the enclosure, and a plurality of battery compartments are arranged sequentially from left to right along the length of the enclosure;

[0016] The control cabinet system, the busbar cabinet system, and the fire sprinkler system are located at the front, back, and right side of the electrical control compartment, respectively.

[0017] Optionally, both the electrical control compartment and the battery compartment are provided with doors on their front and rear sides;

[0018] The door panel of the battery compartment is equipped with a door-mounted cooling air conditioner and a fire-fighting air intake and exhaust device, both of which are connected to the control cabinet system.

[0019] Optionally, the inlet and outlet of the cooling water machine are located on the same side, and the first cooling water pipe and the second cooling water pipe are respectively provided with multiple branch pipes for connecting multiple battery packs one by one.

[0020] Optionally, the cooling water machine is connected to the first cooling water pipe and the second cooling water pipe via corresponding stainless steel pipes.

[0021] Compared with the prior art, this application has at least the following beneficial effects:

[0022] 1. Based on further analysis and research of existing technical problems, this application provides an energy storage system. The internal structure of the enclosure includes a cooling system compartment, an electrical control compartment, and multiple battery compartments. Each battery compartment contains multiple battery clusters and multiple sets of cooling water pipes corresponding to each battery cluster. The control cabinet system is connected to the incoming power supply cabinet system, fire sprinkler system, and cooling water chiller. This application features a reasonable structural design with higher flexibility and compatibility. By splitting a single high-power, high-flow liquid cooling unit into multiple small cooling water chillers of different power, the number and power of these small cooling water chillers can be flexibly configured for energy storage systems of different power ranges, thereby achieving… The single container is compatible with multiple charging and discharging rate designs, making it easier to achieve product serialization. Based on the heat generation of different battery clusters, a single cooler can independently adjust the coolant flow and temperature. Through a one-cluster-one-temperature-control design, adjacent battery clusters do not interfere with each other, achieving more precise temperature control, reducing the temperature difference between battery clusters, and keeping the inter-cluster temperature difference within 2℃, ensuring system stability and more uniform temperature control. The modular design, with each battery cluster equipped with an independent cooler and cooling circuit, ensures that a failure in one cooler will not affect the cooling system of other clusters, improving system reliability and stability while reducing maintenance time and costs.

[0023] 2. Each cooling water machine in this application is equipped with an air guide duct at the front, which can effectively guide the hot air generated by the cooling water machine to be discharged, thereby improving the cooling efficiency;

[0024] 3. The inlet and outlet of the cooling water machine in this application are located on the same side, which makes the layout of the cooling water pipes more regular, saves space, and facilitates maintenance personnel to quickly locate and deal with pipeline problems; the first cooling water pipe and the second cooling water pipe are respectively equipped with branch pipes connecting multiple battery packs, and the coolant is evenly distributed to each battery pack through the branch pipes to ensure that each battery pack can obtain sufficient coolant flow, thereby achieving more uniform heat dissipation;

[0025] 4. The single liquid chiller of this application has an automatic liquid replenishment function, which reduces system maintenance time and makes it easier to maintain. Attached Figure Description

[0026] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0027] Figure 1This is a three-dimensional structural diagram of an energy storage system provided in one embodiment of this application;

[0028] Figure 2 for Figure 1 The front view shown;

[0029] Figure 3 for Figure 1 Internal structure diagram shown Figure 1 ;

[0030] Figure 4 for Figure 1 Internal structure diagram shown Figure 2 ;

[0031] Figure 5 for Figure 1 Internal structure diagram shown Figure 3 ;

[0032] Figure 6 for Figure 3 A partial schematic diagram of the battery cluster and cooling water system.

[0033] Figure 7 for Figure 3 A schematic diagram of the structure of a single battery cluster;

[0034] Figure 8 for Figure 7 Partial diagram of the cooling water pipe Figure 1 ;

[0035] Figure 9 for Figure 7 Partial diagram of the cooling water pipe Figure 2 ;

[0036] Figure 10 for Figure 3 Partial schematic diagram of smoke detectors and heat detectors;

[0037] Figure 11 This is a circuit block diagram provided for one embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Enclosure; 2. Battery compartment; 3. Electrical control compartment; 4. Cooling system compartment; 5. Control cabinet system; 6. Fire sprinkler system; 7. Fire ventilation system; 8. Combiner cabinet system; 9. Battery pack; 10. Air duct; 11. Cooling water unit; 12. High voltage box; 13. Door-mounted cooling air conditioner; 14. First cooling water pipe; 15. Second cooling water pipe; 16. Stainless steel pipe; 17. Smoke detector; 18. Heat detector. Detailed Implementation

[0040] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0042] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to indicate the general relative positional relationship for the purpose of intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product.

[0043] One embodiment of this application discloses an energy storage system, such as... Figures 1-11 As shown, the device includes a housing 1. Inside the housing 1, there is a cooling system compartment 4 located at the top and an electrical control compartment 3 and multiple battery compartments 2 arranged sequentially along the length direction at the bottom. The cooling system compartment 4 corresponds to the upper area of ​​the multiple battery compartments 2.

[0044] Each battery compartment 2 is equipped with multiple battery clusters and multiple sets of cooling water pipes corresponding to each battery cluster. Each set of cooling water pipes includes a first cooling water pipe 14 and a second cooling water pipe 15. The cooling system compartment 4 is equipped with multiple cooling water machines 11, which correspond to multiple battery clusters. The outlet of each cooling water machine 11 is connected to the coolant inlet of a battery cluster through the first cooling water pipe 14, and the inlet of each cooling water machine 11 is connected to the coolant outlet of a battery cluster through the second cooling water pipe 15. The coolant that is about 18°C ​​cold water is introduced into the battery cluster through the first cooling water pipe 14, and then the cooled water (temperature increased) after heat exchange in the battery cluster returns to the cooling water machine 11 through the second cooling water pipe 15.

[0045] The electrical control compartment 3 is equipped with a control cabinet system 5, a busbar cabinet system 8, and a fire sprinkler system 6. The control cabinet system 5 is connected to the busbar cabinet system 8, the fire sprinkler system 6, and the cooling water machine 11 respectively, and is used to receive the temperature signals of each battery cluster and control the operation of the fire sprinkler system 6, the busbar cabinet system 8, and the cooling water machine 11.

[0046] Preferably, multiple battery clusters are arranged sequentially along the length of the housing 1, and each battery cluster includes multiple battery packs 9. The multiple battery packs 9 are arranged sequentially along the height of the housing 1. At the same time, multiple temperature acquisition points are set on the battery packs 9 to detect the temperature status of the battery packs in real time and feed the temperature signal back to the control cabinet system 5.

[0047] More preferably, the battery cluster is a lithium iron phosphate battery cluster; each battery cluster has a high-voltage box 12 at its bottom.

[0048] Preferably, such as Figure 10 As shown, the battery compartment 2 is equipped with a smoke detector 17 and a heat detector 18, which are respectively connected to the control cabinet system 5; the electrical control compartment 3 is equipped with one smoke detector; the number of smoke detectors 17 and heat detectors 18 is set as needed.

[0049] In one embodiment, the interior of the housing 1 is provided with three battery compartments 2, and the front of the housing 1 is provided with three double doors (a total of 6 doors) corresponding to the three battery compartments 2. A smoke detector and a heat detector can be installed inside the battery compartment 2 and on the top plate corresponding to the lower part of the cooling system compartment 4.

[0050] By installing multiple cooling water machines 11 with different power on the top of the container body 1, the individual battery clusters are precisely controlled. The cooling system controls the temperature of the individual battery clusters, and adjacent battery clusters do not interfere with each other, with the temperature difference between clusters controlled within 2℃.

[0051] Preferably, such as Figures 7-9 As shown, the inlet and outlet of the cooling water machine 11 are located on the same side, which makes the layout of the cooling water pipes more regular, saves space, and makes it easier for maintenance personnel to quickly locate and deal with pipeline problems.

[0052] More preferably, the inlet and outlet of the coolant 11 are located on the left side, wherein the first coolant pipe 14 is vertically distributed along the height direction of the housing 1 and located on the left side of the battery cluster, and the second coolant pipe 15 is connected to the inlet of the coolant 11 after passing around the right side, bottom and left side of the battery cluster; at the same time, the first coolant pipe 14 and the second coolant pipe 15 are respectively provided with branch pipes connecting multiple battery packs 9 in a battery cluster, and the coolant is evenly distributed to multiple battery packs 9 through the branch pipes to ensure that each battery pack 9 can obtain sufficient coolant flow, thereby achieving more uniform heat dissipation.

[0053] In a further preferred embodiment, the cooling water machine 11 is connected to the first cooling water pipe 14 and the second cooling water pipe 15 by corresponding stainless steel pipes 16.

[0054] Preferably, each cooling water machine 11 is provided with an air guide duct 10 at the front. The air guide duct 10 can effectively guide the hot air generated by the cooling water machine 11 to be discharged, thereby improving the cooling efficiency.

[0055] Preferably, the electrical control compartment 3 is located on the far right of the housing 1, and multiple battery compartments 2 are arranged sequentially from left to right along the length of the housing 1.

[0056] More preferably, such as Figures 3-6 As shown, the control cabinet system 5, the busbar incoming line cabinet system 8, and the fire sprinkler system 6 are located at the front, back, and right side of the electrical control compartment 3, respectively.

[0057] Preferably, such as Figures 2-4 As shown, door-mounted cooling air conditioners 13 and fire-fighting air intake and exhaust devices 7 are installed on the door panels of the battery compartment 2. Both door-mounted cooling air conditioners 13 and fire-fighting air intake and exhaust devices 7 are connected to the control cabinet system 5. The number of door-mounted cooling air conditioners 13 and fire-fighting air intake and exhaust devices 7 is set according to actual needs.

[0058] Taking three battery compartments 2 as an example, door-mounted cooling air conditioners 13 are installed on the front and rear side doors of the three battery compartments 2. A total of four fire-fighting air intake and exhaust devices 7 are installed on the three battery compartments 2. Two fire-fighting air intake and exhaust devices 7 are installed on the front side door, and the other two fire-fighting air intake and exhaust devices 7 are installed on the rear side door. Each fire-fighting air intake and exhaust device 7 includes an air intake device and an exhaust device. The air intake device is located at the bottom of the door panel, and the exhaust device is located at the top of the door panel.

[0059] In addition, each cooling water unit 11 comes with an automatic liquid replenishment function, which reduces system maintenance time and makes it easier to maintain.

[0060] In the above embodiments, by breaking down a single high-power, high-flow liquid cooling unit into multiple small water turbines of different power and arranging them in a fully and reasonably manner, a single container can be compatible with a variety of design schemes with different charge and discharge rates for energy storage systems of different power ranges.

[0061] Multiple cooling water machines 11 with different power are installed on the top of the container body 1 to precisely control the individual battery clusters. The cooling system controls the temperature of the individual battery clusters, and the adjacent battery clusters do not interfere with each other, and the temperature difference between the clusters is controlled within 2 degrees.

[0062] When a single cooling water unit 11 fails and goes out of service, it does not affect the operation of other energy storage systems.

[0063] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. An energy storage system, characterized in that, The enclosure includes a housing, inside which are arranged a cooling system compartment at the top and an electrical control compartment and multiple battery compartments arranged sequentially along the length of the lower part, with the cooling system compartment corresponding to the upper area of ​​the multiple battery compartments; Each of the battery compartments is equipped with multiple battery clusters and multiple sets of cooling water pipes corresponding to each battery cluster. Each set of cooling water pipes includes a first cooling water pipe and a second cooling water pipe. The cooling system compartment is equipped with multiple cooling water machines, each corresponding to one of the battery clusters. The outlet of each cooling water machine is connected to the coolant inlet of a battery cluster through the first cooling water pipe, and the inlet of each cooling water machine is connected to the coolant outlet of a battery cluster through the second cooling water pipe. The electrical control compartment is equipped with a control cabinet system, a busbar cabinet system, and a fire sprinkler system. The control cabinet system is connected to the busbar cabinet system, the fire sprinkler system, and the cooling water machine, respectively.

2. The energy storage system according to claim 1, characterized in that, Multiple battery clusters are arranged sequentially along the length of the housing, and each battery cluster includes multiple battery packs, which are arranged sequentially along the height of the housing.

3. The energy storage system according to claim 1 or 2, characterized in that, The battery cluster is a lithium iron phosphate battery cluster; Each battery cluster has a high-voltage box at its bottom.

4. The energy storage system according to claim 1 or 2, characterized in that, The battery compartment is equipped with smoke detectors and heat detectors, which are respectively connected to the control cabinet system.

5. The energy storage system according to claim 4, characterized in that, The temperature difference between adjacent battery clusters is less than 2℃.

6. The energy storage system according to claim 1, characterized in that, Each of the aforementioned cooling water machines is equipped with an air guide duct at the front.

7. The energy storage system according to claim 1, characterized in that, The electrical control compartment is located on the far right of the enclosure, and multiple battery compartments are arranged sequentially from left to right along the length of the enclosure. The control cabinet system, the busbar cabinet system, and the fire sprinkler system are located at the front, back, and right side of the electrical control compartment, respectively.

8. The energy storage system according to claim 1, characterized in that, Both the electrical control compartment and the battery compartment are equipped with doors on their front and rear sides; The door panel of the battery compartment is equipped with a door-mounted cooling air conditioner and a fire-fighting air intake and exhaust device, both of which are connected to the control cabinet system.

9. The energy storage system according to claim 2, characterized in that, The inlet and outlet of the cooling water machine are located on the same side, and the first cooling water pipe and the second cooling water pipe are respectively provided with multiple branch pipes for connecting multiple battery packs one by one.

10. The energy storage system according to claim 9, characterized in that, The cooling water machine is connected to the first cooling water pipe and the second cooling water pipe via corresponding stainless steel pipes.

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