Battery cell partition plate for immersed cooling energy storage

Abstract

According to the immersed cooling energy storage battery cell partition plate provided by the invention, partition plates are arranged between the outer sides of the whole battery cell group and the outer side of a cooling pipe and between the battery cells of the immersed battery cell group with immersion liquid, and the surfaces of the front and rear sides of each partition plate are connected with the adjacent battery cells in a front-and-back fitting manner; the partition plate comprises a conducting cross beam, a partition vertical frame and an inserting convex foot, the two sides of the partition vertical frame are symmetrically arranged on the two sides, the conducting cross beam is transversely arranged in the middle between the upper ends of the partition vertical frame, the inner side, connected with the conducting cross beam, of the partition vertical frame is provided with an externally-expanded guide bevel edge, and the thickness of the conducting cross beam is half of the thickness of the partition vertical frame; the thickness center line of the conduction cross beam is flush with the thickness center line of the separation vertical frame, internal cold and heat circulation is achieved through the partition plate, the temperature difference is reduced, the overall temperature difference of the battery pack can be controlled within 1 DEG C, the structural design of the partition plate effectively reserves the bulging space of the battery cells after long-time work, and the safety of the overall battery pack is improved.

Description

Technical Field

[0001] This document belongs to the technical field of immersion energy storage cells, and specifically relates to a cell separator for immersion cooling energy storage. Background Art

[0002] The energy storage immersion technology is in a stage of rapid development. Especially, the immersion liquid cooling energy storage technology has become an important innovation direction in the energy storage field. With the improvement of technology maturity and the successful operation of demonstration projects, more and more enterprises and research institutions have begun to pay attention to and invest in the research and development and commercial application of immersion liquid cooling energy storage technology. The immersion liquid cooling system can significantly improve the battery heat dissipation efficiency, which is more than 50% higher than the traditional air cooling method. This is crucial for ensuring the stability of the battery during high-power charging and discharging processes and extending its service life. At the same time, this technology effectively reduces the fire risk by isolating oxygen and enhances the overall safety of the energy storage system.

[0003] Currently, the energy storage immersion technology is divided into two technical routes. The first is that the battery is completely immersed in the immersion liquid, and the immersion liquid directly leads to the liquid cooler outside the battery pack to achieve a flow cycle and take away the heat generated during the operation of the battery pack. The other is that the battery is completely immersed in the immersion liquid, and the immersion liquid itself does not flow. Cold pipes are arranged in the immersion liquid. The forms of cold pipes are diverse, including copper pipes and aluminum plates, etc. The coolant flows inside the cold pipes. When the battery pack is operating, the heat generated by the cells is transferred to the immersion liquid, and the immersion liquid transfers it to the cold pipes and the coolant inside the cold pipes. The cooling is completed through the flow to take away the heat for heat exchange.

[0004] Currently, each of the two technical routes has its own defects. Taking the second technical route as an example, since the immersion liquid is not connected to an external liquid cooler and there is no water pump to drive the flow, when the battery pack is operating, the heat generated is dissipated. Without control, the temperature difference between the cells in the battery pack is relatively large, which affects the charging and discharging efficiency of the battery pack. Currently, the temperature difference control of the second technical route is blank in the market. Utility Model Content

[0005] In order to solve the above problems, this paper proposes a battery cell partition for immersion cooling energy storage, a combination of several battery cells connected side by side is a battery cell group, the upper outer side of the battery cell group is externally provided with a cold pipe, the overall outer side of the battery cell group and the outer side of the cold pipe are externally provided with an immersion liquid, a partition is provided between each battery cell of the battery cell group, the partition is shaped like a door frame, the front and rear side surfaces of the partition are connected to the adjacent battery cells in a front-to-back fit, a cold pipe is provided on the upper outer side of the partition, the lower outer side of the partition is connected to the bottom support frame by clamping, the partition includes a conducting beam, a partition frame and a plug-in convex foot, the partition frame is symmetrically provided on both sides On both sides, a conducting beam is horizontally provided in the middle between the upper ends of the partition frames, an outward-expanding guiding bevel is provided on the inner side where the partition frames are connected to the conducting beam, and plug-in convex feet are provided on the outer bottom of the partition frames. The thickness of the conducting beam is half of the thickness of the partition frames, and the thickness midline of the conducting beam is flush with the thickness midline of the partition frames. The plug-in convex feet are plug-inly provided on the inner side of the bottom supporting frame, and the internal hot and cold cycle is realized through the partition, which reduces the temperature difference and can control the overall temperature difference of the battery pack within 1°C. The structural design of the partition effectively reserves space for bulging of the battery cells after long-term work, thereby improving the safety of the overall battery pack.

[0006] The battery cell is in the shape of a rectangular block, with the front and rear sides of the battery cell arranged flush with each other, and the bottom of the battery cell is fixedly provided with a bottom support frame, and partitions are provided between each of the flush-arranged battery cells, and the outer surfaces of the battery cells are immersed in the immersion liquid. By connecting the battery cells in combination into an integral battery cell group, it is convenient to set partitions between them, and it is also convenient to set cooling pipes on the upper side thereof, thereby improving the cooling efficiency of the immersed battery cells.

[0007] The cooling tube is in the shape of a serpentine flat tube. The outer side of the cooling tube is arranged on the outer side of the upper end of the battery cell group in a surrounding manner. The flat side surface of the cooling tube is parallel to the outer side of the battery cell. One end of the cooling tube is provided with a protruding water inlet and outlet on the outer side. The cooling tube is arranged on the top of the battery cell in a surrounding manner, so that the high-temperature immersion liquid conducted from the partition between the battery cell and the battery cell can be cooled. Through the change in temperature, an internal circulation effect is achieved for the immersion liquid on the outside of the battery cell.

[0008] The bottom support frame is in the shape of a C-shaped long folded groove plate, and the surfaces of the folded corners on both sides of the bottom support frame are equidistantly provided with plug-in grooves, the spacing of the plug-in grooves is the same as the width of the battery cell, and the bottom of the plug-in grooves is plug-in and fixed with plug-in protrusions. Through the bottom support frame, not only can the battery cells be conveniently fixed and integrated into an integrated battery cell group, but also the partitions between the battery cells can be conveniently fixed, thereby facilitating the installation between the battery cells and the partitions.

[0009] The partition frame is in the shape of a vertical rectangular strip, and oblique reinforcing rib grooves are provided on both side surfaces of the partition frame. A guiding bevel is provided at a corner of the upper end of the partition frame, and the guiding bevel expands outward toward the middle of the top of the partition frame. A conducting crossbeam is provided on the inner side of the guiding bevel in a transverse connection. The partition frame can conveniently separate the left and right sides of the battery cell surface so that three vertical guide grooves are formed between the battery cell surfaces to guide the immersion liquid. The outer sides of the partition frame are descending flow channels, and the space between the partition frames is an ascending flow channel, and the guiding bevel at the upper end of the partition frame can expand outward to expand the immersion liquid to the outside on both sides to achieve circulating diversion.

[0010] The conductive cross plate is in the shape of a long rectangular plate, with the two ends of the conductive cross plate respectively fixed between the partition frames on both sides, reinforcing oblique ribs provided at the bottom of both ends of the conductive cross plate, and guide grooves provided between the front and rear surfaces of the conductive cross plate and the battery cells on both sides. The partition frames on both sides are connected as a whole through the conductive cross plate, thereby facilitating the production and installation of the partition as a whole, and the thickness of the conductive cross plate is smaller than the partition frame, thereby realizing the immersion liquid on both sides of the conductive cross plate being discharged from both sides.

[0011] The plug-in protrusions are in the shape of rectangular protrusions, and are protrudingly arranged on the outer bottom of the partition frame. The bottom surface of the plug-in protrusions is flush with the bottom surface of the partition frame. The outer sides of the plug-in protrusions on both sides of the bottom of the partition are spaced the same as the width of the bottom support frame. The partition is conveniently connected and fixed to the battery cell and the bottom support frame through the plug-in protrusions, thereby ensuring the fixed fitting strength of the partition.

[0012] Beneficial effects:

[0013] The partition realizes internal hot and cold circulation, reduces the temperature difference, and can control the overall temperature difference of the battery pack within 1°C. The structural design of the partition effectively reserves space for the battery cells to swell after long-term work, thereby improving the safety of the overall battery pack.

[0014] By connecting the battery cells in a combined manner into an integral battery cell group, it is convenient to set partitions between them, and it is also convenient to set cooling pipes on the upper side thereof, thereby improving the cooling efficiency of the immersed battery cells.

[0015] By means of a surrounding cooling tube disposed above the battery cell, the high-temperature immersion liquid transmitted from the partition between the battery cell and the battery cell can be cooled, and through the change in temperature, an internal circulation effect is achieved for the immersion liquid outside the battery cell.

[0016] The bottom support frame can not only conveniently fix the battery cells into an integrated battery cell group, but also conveniently fix the partitions between the battery cells, thereby facilitating the installation between the battery cells and the partitions.

[0017] The partition frame can be used to conveniently separate the left and right sides of the battery cell surface so that three vertical guide grooves are formed between the battery cell surfaces to guide the immersion liquid. The outer sides of the partition frame are descending flow channels, and the space between the partition frames is an ascending flow channel. The guiding bevel at the upper end of the partition frame can expand the immersion liquid outward to the outside on both sides to achieve circulating diversion.

[0018] The conducting cross plate is used to connect the partition frames on both sides into a whole, so as to facilitate the production and installation of the partition as a whole. The thickness of the conducting cross plate is smaller than that of the partition frame, so that the immersion liquid on both sides of the conducting cross plate can be discharged from both sides.

[0019] The partition is conveniently connected and fixed to the battery cell and the bottom support frame by inserting the convex pins, thereby ensuring the fixing and fitting strength of the partition. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a battery cell assembly of a battery cell separator for immersion cooling energy storage;

[0021] Figure 2 It is a schematic diagram of a separator of a battery cell separator for immersion cooling energy storage;

[0022] Figure 3 It is a heat simulation cloud diagram of a battery cell separator used for immersion cooling energy storage;

[0023] In the figure; 1, battery cell, 2, cooling tube, 3, partition, 31, conducting beam, 32, partition frame, 33, plug-in protruding foot, 4, bottom supporting frame. DETAILED DESCRIPTION

[0024] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0025] The battery cell 1, the cooling tube 2, the partition 3, the conducting cross beam 31, the partition frame 32, the plug-in protruding feet 33, and the bottom supporting frame 4.

[0026] like Figure 1 , 2 , as shown in 3;

[0027] A separator 3 for an immersion-cooled energy storage cell 1. A number of cells 1 are combined in a side-by-side connection to form a cell group. An outer cold pipe 2 is provided in an outer wrapping manner on the upper end outside the cell group. An immersion liquid is provided in an outer wrapping manner on the outside of the whole cell group and the outside of the cold pipe 2. A separator 3 is provided between each cell 1 in the cell group. The separator 3 is in the shape of a door-shaped frame. The front and back surfaces of the separator 3 are in front and back fitting connection with the adjacent cells 1. A cold pipe 2 is provided on the outer side of the upper end of the separator 3. The outer side of the lower end of the separator 3 is in snap connection with the bottom support bracket 4. The separator 3 includes a conduction cross beam 31, a partition vertical frame 32 and a plug-in convex foot 33. The partition vertical frames 32 are symmetrically arranged on both sides. A conduction cross beam 31 is horizontally provided in the middle between the upper ends of the partition vertical frames 32. An outward-expanding guiding bevel is provided on the inner side where the partition vertical frame 32 is connected to the conduction cross beam 31. An outward-projecting plug-in convex foot 33 is provided at the outer bottom of the partition vertical frame 32. The thickness of the conduction cross beam 31 is half of the thickness of the partition vertical frame 32. The thickness midline of the conduction cross beam 31 is flush with the thickness midline of the partition vertical frame 32. The plug-in convex foot 33 is provided in a plug-in manner on the inner side of the bottom support bracket 4. The cell 1 is in the shape of a rectangular block. The front and back sides of the cell 1 are arranged flush with each other. A bottom support bracket 4 is fixedly provided in an outer wrapping manner at the bottom of the cell 1. A separator 3 is provided between each of the flush-arranged cells 1. The outer surface of the cell 1 is provided in an immersion manner in the immersion liquid. The cold pipe 2 is in the shape of a serpentine flat pipe. The cold pipe 2 is provided in a surrounding manner on the outer side of the upper end of the cell group. The flat side surface of the cold pipe 2 is parallel to the outer side of the cell 1. An inlet and outlet is provided in a protruding manner on the outer side of one end of the cold pipe 2. The bottom support bracket 4 is in the shape of a C-shaped long strip folded-edge groove plate. Plug-in cut grooves are equidistantly provided on the folded-edge surfaces at both sides of the bottom support bracket 4. The spacing of the plug-in cut grooves is the same as the width of the cell 1. The plug-in convex foot 33 is fixedly provided at the bottom of the plug-in cut grooves in a plug-in manner. The partition vertical frame 32 is in the shape of a vertical rectangular strip plate. Oblique reinforcing rib grooves are provided on both surfaces of the partition vertical frame 32. A guiding bevel is provided at one corner of the upper end of the partition vertical frame 32. The guiding bevel expands outward towards the middle of the top of the partition vertical frame 32. The conduction cross beam 31 is horizontally connected to the inner side of the guiding bevel. The conduction cross plate is in the shape of a long strip rectangular plate. The two ends of the conduction cross plate are respectively fixedly connected between the two partition vertical frames 32 on both sides. Reinforcing inclined ribs are provided at the bottoms of the two ends of the conduction cross plate. Flow guiding grooves are provided between the front and back surfaces of the conduction cross plate and the two cells 1 on both sides. The plug-in convex foot 33 is in the shape of a rectangular convex block. The plug-in convex foot 33 protrudes from the outer bottom of the partition vertical frame 32. The bottom surface of the plug-in convex foot 33 is flush with the bottom surface of the partition vertical frame 32. The spacing between the outer sides of the plug-in convex feet 33 at both sides of the bottom of the separator 3 is the same as the width of the bottom support bracket 4.

[0028] Implementation example;

[0029] This partition 3 is arranged between the two surfaces of the battery cell 1 to maximize the use of the surface to balance the temperature difference. The function of this partition 3 enables the density of the surrounding immersion liquid to change due to the heat dissipated by the battery and the cold generated by the cold pipe 2 during the operation of the battery pack. As the temperature of the immersion liquid rises, its density decreases. Therefore, the liquid with a lower temperature will sink, and the liquid with a higher temperature will rise. The presence of this partition 3 allows the liquid to form a flow cycle that is invisible to the naked eye, as shown in the simulation cloud diagram below. The arrow direction represents the flow direction, and the color represents the temperature.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cell separator for immersion cooling energy storage. A number of cells are combined in a side-by-side connection to form a cell group. A cold pipe is provided in an outer wrapping manner on the upper outer side of the cell group. An immersion liquid is provided in an outer wrapping manner on the overall outer side of the cell group and the outer side of the cold pipe. It is characterized in that A separator is provided between each cell of the cell group. The separator is in the shape of a door-shaped frame. The front and back surfaces of the separator are adhesively connected to the adjacent cells in a front-to-back manner. A cold pipe is provided outside the upper end of the separator. The lower end outside of the separator is snap-connected to the bottom support bracket. The separator includes a conduction cross beam, a partition vertical frame, and a plug-in convex foot. The partition vertical frames are symmetrically arranged on both sides. A conduction cross beam is horizontally provided in the middle between the upper ends of the partition vertical frames. An outward-expanding guiding bevel is provided on the inner side where the partition vertical frame is connected to the conduction cross beam. The bottom outside of the partition vertical frame is convexly provided with a plug-in convex foot. The thickness of the conduction cross beam is half of the thickness of the partition vertical frame, and the thickness center lines of the conduction cross beam and the partition vertical frame are flush with each other. The plug-in convex foot is plug-in arranged inside the bottom support bracket.

2. The cell separator for immersion cooling energy storage according to claim 1, wherein The cell is in the shape of a rectangular block. The front and back sides of the cell are arranged flush with each other. A bottom support bracket is fixedly provided outside the bottom of the cell. A separator is provided between each of the flush-arranged cells. The outer surfaces of the cells are immersed in the immersion liquid.

3. The cell separator for immersion cooling energy storage according to claim 1, characterized in that, The cold pipe is in the shape of a serpentine flat pipe. The cold pipe is arranged in a surrounding manner outside the upper end of the cell group. The flat side surface of the cold pipe is parallel to the outer side of the cell. An inlet and outlet is provided in a protruding manner outside one end of the cold pipe.

4. The cell separator for immersion cooling energy storage according to claim 1, wherein The bottom support bracket is in the shape of a C-shaped long strip folded-edge groove plate. Plug-in cut grooves are equidistantly provided on the surface of the folded corners on both sides of the bottom support bracket. The spacing of the plug-in cut grooves is the same as the width of the cell. A plug-in convex foot is fixedly provided at the bottom of the plug-in cut groove.

5. The cell separator for immersion cooling energy storage according to claim 1, characterized in that, The partition vertical frame is in the shape of a vertical rectangular strip plate. Oblique strengthening rib grooves are provided on both surfaces of the partition vertical frame. A guiding bevel is provided at one corner of the upper end of the partition vertical frame. The guiding bevel expands outward towards the middle of the top of the partition vertical frame. The conduction cross beam is horizontally connected inside the guiding bevel.

6. The cell separator for immersion cooling energy storage according to claim 1, characterized in that, The conduction cross plate is in the shape of a long rectangular plate. The two ends of the conduction cross plate are respectively fixedly arranged between the partition vertical frames on both sides. Strengthening inclined ribs are provided at the bottoms of the two ends of the conduction cross plate. Flow guiding grooves are provided between the front and back surfaces of the conduction cross plate and the cells on both sides.

7. The cell separator for immersion cooling energy storage according to claim 1, wherein, The plug-in convex foot is in the shape of a rectangular convex block. The plug-in convex foot protrudes from the outside bottom of the partition vertical frame. The bottom surface of the plug-in convex foot is flush with the bottom surface of the partition vertical frame. The spacing between the outer sides of the plug-in convex feet on both sides of the bottom of the separator is the same as the width of the bottom support bracket.

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