Cabinet type energy storage power supply

Abstract

The utility model provides a cabinet type energy storage power supply, which relates to the technical field of energy storage power supplies and comprises a cuboid shell, a battery module arranged in the cuboid shell, a spray cooling assembly and an abnormity control assembly. The battery modules are arranged in four columns, each column comprises a battery cell group formed by eight square lithium battery cells, and the adjacent square lithium battery cells are connected through connecting sheets; the spray cooling assembly comprises a spray source, a spray valve and a plurality of spray pipes, the spray source is used for providing cooling liquid, and the plurality of spray pipes are respectively arranged between the square lithium battery cells in adjacent columns and are used for spraying the cooling liquid to the battery modules; the abnormity control assembly comprises a controller and a plurality of temperature probes, the plurality of temperature probes are respectively arranged near the central position of each column of square lithium cells, and the controller is electrically connected with the temperature probes and the spraying valves. The spraying pipes are arranged between the square lithium battery cells in the adjacent columns for spraying and cooling, so that the problem that the risk of local overheating and thermal runaway spreading of the battery module is difficult to effectively inhibit is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of energy storage power supply especially relates to a cabinet type energy storage power supply. BACKGROUND

[0002] In recent years, with the continuous growth of global energy demand and the increasing emphasis on renewable energy, cabinet type energy storage power supply as an important energy storage solution has been widely used. This kind of energy storage power supply is usually composed of a large number of battery modules to meet the large-scale energy storage demand. Among them, lithium ion battery becomes the commonly used cell type in cabinet type energy storage power supply because of its high energy density, long cycle life and other advantages. In order to ensure the safe and reliable operation of battery module and prolong its service life, efficient thermal management is very important.

[0003] In the existing cabinet type energy storage power supply, the common battery module cooling methods include natural cooling, forced air cooling and liquid cooling. Natural cooling relies on the natural convection of air to dissipate heat, and the cooling efficiency is low, which is difficult to meet the cooling demand of high energy density energy storage system. Forced air cooling accelerates air flow by fan to take away heat, although the cooling efficiency is improved, but in high density battery module, there are still problems such as uneven temperature distribution and local heat accumulation. The traditional liquid cooling method, such as using cooling plate or cooling pipeline for indirect cooling, its cooling efficiency and uniformity are improved compared with air cooling, but the system structure is more complex, there is the risk of cooling liquid leakage, and the contact area between cooling liquid and cell is limited, which is difficult to realize the rapid and uniform cooling of cell.

[0004] Especially in high density battery module, such as the structure of multiple square lithium cells arranged closely, because the gap between cells is small, the cooling efficiency of traditional cooling method is further limited. When individual cell appears abnormal heating or even thermal runaway, the generated heat is easy to transfer to the surrounding cells, causing chain reaction, which seriously threatens the safety of energy storage system.

[0005] Therefore, it is necessary to improve the existing cabinet type energy storage power supply to overcome the defects of the prior art. SUMMARY

[0006] In order to overcome the problems existing in the related art, the purpose of the utility model is to provide a cabinet type energy storage power supply, which sprays and cools by setting spray pipe between adjacent rows of square lithium cells, and uses temperature probe to monitor the temperature of each row of cells in real time, and according to the temperature detection result, the opening and closing of spray valve are accurately controlled, so as to solve the problem that it is difficult to effectively suppress the risk of local overheating and thermal runaway spread of battery module in the prior art.

[0007] A cabinet type energy storage power supply, comprising:

[0008] Cuboid shell;

[0009] A battery module is arranged in the cuboid shell, and the battery module includes thirty-two square lithium cells arranged in four columns, each column including eight cell groups formed by the square lithium cells, and the adjacent square lithium cells are connected by connecting pieces.

[0010] The spray cooling assembly includes a spray source, a spray valve, and a plurality of spray pipes, the spray source is used to provide cooling liquid, and the plurality of spray pipes are respectively arranged between the adjacent columns of square lithium cells and used to spray the cooling liquid to the battery module.

[0011] The abnormality control assembly includes a controller and a plurality of temperature probes, the plurality of temperature probes are respectively arranged near the center positions of each column of square lithium cells, the controller is electrically connected with the temperature probes and the spray valve, and used to control the opening and closing of the spray valve according to the detection results of the temperature probes.

[0012] By arranging the spray pipes between the adjacent columns of the battery module, the cooling liquid can be effectively sprayed to the battery module to achieve precise cooling of the battery. At the same time, the temperature of each column of cells is monitored by the plurality of temperature probes, and the controller controls the opening and closing of the spray valve according to the detection results of the temperature probes to achieve intelligent and targeted cooling of the battery module, which can effectively reduce the battery temperature in time and inhibit the occurrence of thermal runaway, thereby improving the safety of the energy storage power supply.

[0013] Further, the cooling liquid is hydrofluoroether or fluoroketone.

[0014] Hydrofluoroether or fluoroketone is used as the cooling liquid, which takes advantage of its good electrical insulation and chemical inertness to minimize the impact of the cooling liquid on the battery module and electrical components during the spray cooling process, avoiding the risk of short circuit and further improving the safety of the energy storage power supply.

[0015] Further, the spray pipe extends along the height direction of the battery module, and the spray pipe is provided with a plurality of spray holes.

[0016] The spray pipe extends along the height direction of the battery module and is provided with a plurality of spray holes, and the spray pipe extends into the cell groups from above or below the battery module, which can ensure that the cooling liquid is evenly distributed on the battery module, achieving more uniform and effective cooling and avoiding local overheating.

[0017] Further, one end of the spray pipe is connected to the spray source, and the other end is closed, the spray pipe is provided with four spray holes, the four spray holes are arranged near the closed end of the spray pipe, and two spray holes are arranged along the row direction and column direction of the battery module, respectively.

[0018] The spray holes are arranged close to the closed end of the spray pipe and are distributed along the row direction and the column direction, which helps to spray the cooling liquid more concentratedly to the core area of the battery module, improves the cooling efficiency, and especially focuses on cooling the higher temperature in the center area of the module.

[0019] Further, the spray pipe is provided with four, and the four spray pipes are evenly arranged on the battery module.

[0020] The four spray pipes are evenly distributed on the battery module, which can ensure uniform coverage of the cooling liquid on the entire battery module, avoid local overheating or uneven cooling, and achieve full coverage of the battery module with fewer spray pipes.

[0021] Further, the spray source is a compressed tank, and each spray pipe is provided with a corresponding compressed tank, and the compressed tank is fixed to the rectangular shell above the battery module.

[0022] The compressed tank is used as the spray source, and each spray pipe is provided with a corresponding compressed tank, which realizes independent supply and spraying of the cooling liquid, improves the reliability and response speed of the cooling system, and even if part of the compressed tank fails, the other spray pipes can still work normally, enhancing the redundancy of the system. The compressed tank is fixed to the rectangular shell above the battery module, saving space and facilitating installation and maintenance.

[0023] Further, the wiring end of the square lithium battery cell is arranged upward, and the eight square lithium battery cells of each battery cell group are arranged in two columns and four rows, and the four sides and the bottom of each battery cell group are provided with a fixed protection bracket, and the fixed protection bracket is fixedly connected with the rectangular shell.

[0024] The wiring end of the square lithium battery cell is arranged upward, and the arrangement mode of two columns and four rows is adopted, which is compact in structure and high in space utilization. The fixed protection bracket can effectively fix and protect the battery cell group, prevent the battery cell from being damaged due to vibration or impact, and improve the structural strength and safety of the battery module.

[0025] Further, along the row direction of the battery module, the top of the battery module is provided with four fixing strips, which are respectively arranged corresponding to the middle part of the four rows of square lithium battery cells.

[0026] The fixing strips are arranged on the top of the battery module, which can further fix the battery module, enhance the structural stability of the battery module, prevent the displacement of the battery cell, and improve the reliability of the system.

[0027] Further, the middle part of the wiring end of the square lithium battery cell is provided with an explosion-proof valve, and the fixing strip is provided with a hollow corresponding to the position of the explosion-proof valve.

[0028] The hollow is arranged at the position corresponding to the explosion-proof valve on the fixed strip, so that when the internal pressure of the battery cell is too large, the explosion-proof valve can normally play a pressure relief role, more serious accidents caused by pressure accumulation are avoided, and the safety performance of the energy storage power supply is improved.

[0029] Further, one end of the cuboid shell is provided with an electrical panel, the electrical panel is provided with an electrical interface and a button, the electrical panel has a gap with the battery module, one end of the battery module close to the electrical panel is provided with a mounting plate, the mounting plate has a gap with the battery module, and the controller is fixed on the mounting plate.

[0030] The electrical panel is arranged at one end of the cuboid shell, and the controller is fixed on the mounting plate which has a gap with the battery module, so that the electrical components and the battery module are physically isolated, the risk of damage of the electrical components caused by abnormal battery is reduced, the safety of the electrical system is improved, and the maintenance and replacement of the electrical components are facilitated.

[0031] The utility model has the advantages of:

[0032] The utility model provides a cabinet type energy storage power supply, through adopt cuboid shell to the internal component carries out effective protection to the integration battery module, spray cooling assembly and abnormal control component, has constructed a compact structure, safe and reliable energy storage system. The battery module adopts specific arrangement mode, provides the basis for subsequent uniform spray of cooling liquid, the spray cooling assembly can spray the cooling liquid to the battery module in time, effectively takes away the heat, the abnormal control component monitors the temperature of each column battery cell in real time, and according to temperature feedback, the start-stop of spray cooling assembly is accurately controlled, realizes the efficient and safe temperature management to battery module, thereby effectively reduces the security risk caused by battery overheating or abnormal state. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a schematic diagram of the cabinet type energy storage power supply provided in the embodiment of the application;

[0034] Figure 2 It is Figure 1 It is an internal schematic diagram after removing the top cover of the cuboid shell and the epoxy plate above the battery module;

[0035] Figure 3 It is Figure 2 It is a position schematic diagram of the spray pipe after removing the battery module;

[0036] Figure 4 It is a top view of the cabinet type energy storage power supply provided in the application after removing the top cover of the cuboid shell;

[0037] Figure 5 It is Figure 4 A-A sectional view of it;

[0038] Figure 6 is a schematic view of a spray cooling assembly provided in an embodiment of the present application;

[0039] Figure 7 is a schematic view of a spray hole on a spray pipe provided in an embodiment of the present application.

[0040] Reference signs:

[0041] 100, cuboid shell; 110, electrical panel; 120, mounting plate; 200, battery module; 210, square lithium cell; 220, cell group; 300, spray cooling assembly; 310, spray source; 320, spray valve; 330, spray pipe; 331, spray hole; 410, control board; 510, fixed protection bracket; 520, fixed strip. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present application will be described in more detail by referring to the attached drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0043] As shown in Figures 1 to 7 , the cabinet type energy storage power supply provided in the present embodiment mainly consists of a cuboid shell 100, a battery module 200, a spray cooling assembly 300 and an abnormality control assembly.

[0044] The cuboid shell 100 serves as an external protective structure of the energy storage power supply and can be made of metal material, such as cold-rolled steel sheet, with sufficient strength and rigidity, which can effectively protect the internal battery module 200 and other electronic components from external environment, such as dust, moisture and mechanical impact.

[0045] The size of the shell can be designed according to the actual required energy storage capacity and power. In order to facilitate transportation and installation, the bottom of the shell can be provided with pulleys or lifting holes.

[0046] The battery module 200 is contained inside the cuboid shell 100 and is the core energy storage unit of the energy storage power supply.

[0047] In the present embodiment, the battery module 200 is composed of thirty-two square lithium cells 210.

[0048] These square lithium cells 210 can be lithium iron phosphate, ternary lithium or other lithium ion batteries suitable for energy storage applications.

[0049] In order to realize a compact structure and efficient heat dissipation, the thirty-two square lithium cells 210 are arranged into four columns, each column containing eight square lithium cells 210.

[0050] In the same column, the eight square lithium cells 210 are stacked in the vertical direction. The adjacent square lithium cells 210 are electrically connected by connecting pieces, which are usually made of conductive materials such as copper or aluminum, and may be insulated to ensure stable transmission of current and prevent short circuits.

[0051] The spray cooling assembly 300 is one of the key features of the utility model, which is used to actively cool the battery module 200.

[0052] The assembly mainly includes a spray source 310, a spray valve 320 and a plurality of spray pipes 330.

[0053] The spray source 310 is used to provide cooling liquid, which is preferably hydrofluoroether or fluoroketone with good electrical insulation and chemical inertness in this embodiment. For example, 3M™ Novec™ 7100 or 3M™ Novec™ 1230 can be used as cooling liquid.

[0054] Considering the independence and reliability of cooling, one spray source 310, specifically a compressed tank, is provided for each spray pipe 330 in this embodiment. Each compressed tank stores a predetermined amount of cooling liquid inside and is filled with an appropriate amount of compressed gas, such as nitrogen, to provide the power for spraying. These compressed tanks can be fixed to the inner top wall of the cuboid shell 100 above the battery module 200, which not only saves space but also facilitates installation and maintenance.

[0055] The spray valve 320 controls whether the cooling liquid is sprayed or not, which can be an electromagnetic valve, the opening and closing of which is controlled by the controller of the abnormality control assembly.

[0056] A plurality of spray pipes 330 are arranged between the square lithium cells 210 of adjacent columns.

[0057] Specifically, there are four spray pipes 330 arranged between the four columns of square lithium cells 210, all of which are arranged at the corner points of the square lithium cells 210. Two are arranged between the first column of cell groups 220 and the second column of cell groups 220, and two are arranged between the third column of cell groups 220 and the fourth column of cell groups 220. The two spray pipes 330 between the cell groups 220 are arranged between the first row of cell groups 220 and the second row of cell groups 220, and between the third row of cell groups 220 and the fourth row of cell groups 220.

[0058] The spray pipe 330 extends vertically along the height direction of the battery module 200 and reaches a position of one-half height of the battery module 200. In order to achieve uniform spraying of the cooling liquid, a plurality of spray holes 331 are arranged on the spray pipe 330.

[0059] In the present embodiment, four spray holes 331 are arranged on each spray pipe 330. One end of the spray pipe 330 is connected to the compression tank as an inlet of the cooling liquid, and the other end is designed to be closed. The four spray holes 331 are arranged close to the closed end of the spray pipe 330, and two are arranged in the row direction and two are arranged in the column direction of the battery module 200. Such a design enables the cooling liquid to be more concentratedly sprayed to the central region of the battery module 200, and in particular, to the region that may have a higher temperature.

[0060] The abnormality control assembly is responsible for monitoring the temperature of the battery module 200 and starting the spray cooling system when the temperature is abnormal.

[0061] The abnormality control assembly mainly includes a controller and a plurality of temperature probes.

[0062] The controller, as the control center of the entire cooling system, can be a microprocessor or a PLC (Programmable Logic Controller).

[0063] The plurality of temperature probes are used to detect the temperature of the battery module 200 in real time.

[0064] In order to accurately reflect the temperature condition of each column of battery cells, one temperature probe is arranged near the center of each column of square lithium battery cells 210 in the present embodiment.

[0065] The temperature probe can be a thermistor or a thermocouple, etc., which is used to convert the temperature signal into an electrical signal and transmit it to the controller.

[0066] The controller is connected to the temperature probes and the spray valves 320 through wires.

[0067] The controller has a preset temperature threshold value, for example, the temperature threshold value can be set to 80°C. When the controller receives a temperature signal from any one of the temperature probes that exceeds the threshold value, the controller will immediately issue an instruction to open all the spray valves 320 and start the spray cooling assembly 300 to spray the cooling liquid to the battery module 200 to reduce the battery temperature. When the temperature detected by all the temperature probes drops below the preset safe temperature, for example, 40°C, the controller will again issue an instruction to close the spray valves 320 and stop spraying.

[0068] In the embodiment, the connection end of the square lithium battery cell 210 is arranged upward. Considering the compactness and heat dissipation requirement of the battery module 200, the eight square lithium battery cells 210 of each cell group 220 are arranged in two columns and four rows.

[0069] In order to fix and protect the cell group 220, the four sides and the bottom of each cell group 220 are provided with fixed protection supports 510, which can be made of metal or high-strength plastic and are fixedly connected with the cuboid shell 100 by bolts or other means to provide stable support.

[0070] In order to further enhance the structural stability of the battery module 200, four fixing strips 520 are arranged on the top of the battery module 200 along the row direction of the battery module 200, corresponding to the middle part of the four rows of square lithium battery cells 210, to limit the top of the cell.

[0071] Considering that the middle part of the connection end of the square lithium battery cell 210 is usually provided with an explosion-proof valve, in order to ensure that the explosion-proof valve can work normally when necessary, the fixing strip 520 is provided with an opening corresponding to the position of the explosion-proof valve, so as to avoid the fixing strip 520 hindering the pressure relief function of the explosion-proof valve.

[0072] In order to facilitate external electrical connection and operation, one end of the cuboid shell 100 is provided with an electrical panel 110, and the electrical panel 110 is provided with a power input / output interface, a communication interface (such as a CAN bus or an RS485 interface), and some indicator lights and operation buttons.

[0073] Considering electrical safety, a certain gap is left between the electrical panel 110 and the battery module 200 to form physical isolation.

[0074] The battery module 200 is provided with a mounting plate 120 at one end close to the electrical panel 110, and a gap is also left between the mounting plate 120 and the battery module 200. The controller is fixed on the mounting plate 120. This layout helps to isolate the control circuit from the high-voltage battery area, reduces the safety risk, and facilitates the maintenance and replacement of the controller.

[0075] The cabinet type energy storage power supply provided by the embodiment realizes accurate spraying and efficient cooling of the cooling liquid, effectively solves the problem of difficult suppression of thermal runaway of the battery cell, can quickly respond to temperature abnormalities of the battery module 200, timely performs cooling, avoids the risk of thermal runaway, and significantly improves the safety and reliability of the energy storage power supply.

[0076] The relative arrangement, numerical expressions, and numerical values of the components and steps set forth in the embodiments are not limiting to the scope of the application unless otherwise specifically stated. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the example embodiments can have different values. It should be noted that like numbers and letters refer to like items throughout the drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0077] In addition, it should be noted that the use of the words "first", "second", and the like, is merely intended to differentiate between similar items, and the words do not have special meanings unless otherwise stated, and thus should not be interpreted as limiting the scope of protection of the present application.

[0078] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cabinet-type energy storage power supply, characterized by, Comprise: A cuboid shell (100); A battery module (200) arranged in the cuboid shell (100), the battery module (200) comprising thirty-two square lithium cells (210), arranged in four columns, each column comprising an electric cell group (220) formed by eight square lithium cells (210), and adjacent square lithium cells (210) are connected by connecting pieces; A spray cooling assembly (300) comprising a spray source (310), a spray valve (320) and a plurality of spray pipes (330), the spray source (310) is used to provide cooling liquid, and a plurality of spray pipes (330) are respectively arranged between adjacent columns of square lithium cells (210) for spraying cooling liquid to the battery module (200); An abnormality control assembly comprising a controller and a plurality of temperature probes, a plurality of temperature probes are respectively arranged near the center position of each column of square lithium cells (210), and the controller is electrically connected with the temperature probes and the spray valve (320) for controlling the opening and closing of the spray valve (320) according to the detection results of the temperature probes.

2. The cabinet type energy storage power supply according to claim 1, wherein: The cooling liquid is hydrofluoroether or fluoroketone.

3. The cabinet type energy storage power supply according to claim 2, wherein: The spray pipe (330) extends along the height direction of the battery module (200), and the spray pipe (330) is provided with a plurality of spray holes (331).

4. The cabinet type energy storage power supply according to claim 3, wherein: One end of the spray pipe (330) is connected to the spray source (310), and the other end is closed, the spray pipe (330) is provided with four spray holes (331), the four spray holes (331) are arranged close to the closed end of the spray pipe (330), and two are arranged along the row direction and column direction of the battery module (200) respectively.

5. The cabinet type energy storage power supply according to claim 4, wherein: The spray pipe (330) is provided with four, and four spray pipes (330) are uniformly arranged on the battery module (200).

6. The cabinet type energy storage power supply according to claim 5, wherein: The spray source (310) is a compression tank, one spray pipe (330) corresponds to one compression tank, and the compression tank is fixed to the cuboid shell (100) above the battery module (200).

7. The cabinet type energy storage power supply according to claim 6, wherein: The wiring end of the square lithium cell (210) is arranged upward, eight square lithium cells (210) of each electric cell group (220) are arranged in two columns and four rows, and a fixed protection bracket (510) is arranged around and at the bottom of each electric cell group (220), and the fixed protection bracket (510) is fixedly connected with the cuboid shell (100).

8. The cabinet type energy storage power supply according to claim 7, wherein: The top of the battery module (200) is provided with four fixing strips (520) corresponding to the middle of the four rows of square lithium battery cells (210) in the row direction of the battery module (200).

9. The cabinet type energy storage power supply according to claim 8, characterized in that: The middle of the wiring end of the square lithium battery cell (210) is provided with an explosion-proof valve, and the fixing strip (520) is provided with an opening corresponding to the position of the explosion-proof valve.

10. The cabinet type energy storage power supply according to claim 9, characterized in that: One end of the cuboid shell (100) is provided with an electrical panel (110), the electrical panel (110) is provided with an electrical interface and a button, the electrical panel (110) and the battery module (200) have a gap, one end of the battery module (200) close to the electrical panel (110) is provided with a mounting plate (120), the mounting plate (120) and the battery module (200) have a gap, and the controller is fixed on the mounting plate (120).

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