Liquid-cooled energy storage battery

Abstract

The utility model discloses a liquid-cooled energy storage battery which comprises a fixed plate and a plurality of battery cells, the fixing plate comprises a plate main body, the plate main body is provided with a bearing surface and a bottom surface which are opposite to each other in the thickness direction of the plate main body, a plurality of battery cells are arranged on the bearing surface, the width of the bearing surface is matched with the size of the bin wall of the immersion bin, the plurality of battery cells are arranged in multiple rows and multiple columns, and a gap space is formed between every two adjacent battery cells; a plurality of groups of oil passing holes are formed in the plate main body; in the thickness direction of the plate main body, the oil passing holes penetrate through the two surfaces of the plate main body; and the plurality of groups of oil passing holes correspond to a plurality of clearance spaces among the plurality of battery cells. The heat dissipation effect of the battery cell is good.

Description

Technical Field

[0001] The utility model relates to the field of liquid-cooled energy storage batteries, in particular to a liquid-cooled energy storage battery. Background Art

[0002] Currently, there are two main heat dissipation methods for energy storage systems: air cooling and liquid cooling. Air cooling systems use air conditioning as the cooling medium, resulting in low energy efficiency, a large equipment footprint, and poor temperature consistency across the energy storage batteries. Liquid cooling systems use water as the cooling medium, exchanging heat with the energy storage batteries via cooling plates. Heat must pass through the battery casing, the cooling plates, and ultimately the cooling medium before being discharged through the radiator. Due to the complex heat transfer process, high thermal resistance and low heat exchange efficiency, high performance requirements are placed on the radiator.

[0003] To address these issues, immersion-cooled energy storage battery cabinets have emerged on the market. These completely submerge the batteries in an insulating cooling medium, ensuring full contact between the cooling medium and the battery housing surface, thereby improving heat dissipation. However, this cooling method places high demands on the fluidity of the cooling medium, which directly impacts heat dissipation. Because the batteries in the cabinet are stacked in layers, each secured to a fixed plate, the cooling medium can experience localized slow flow between the layers, reducing overall heat dissipation. Utility Model Content

[0004] The present invention aims to solve one of the technical problems in the related art to a certain extent. To this end, the present invention provides a liquid-cooled energy storage battery with good heat dissipation effect on the battery core.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A liquid-cooled energy storage battery includes a fixing plate and a plurality of battery cells; the fixing plate includes a plate body, the plate body having a bearing surface and a bottom surface opposite to each other in its thickness direction, the plurality of battery cells are arranged on the bearing surface, and the bearing surface has a width adapted to the size of the silo wall of the immersion silo.

[0007] The multiple battery cells are arranged in multiple rows and columns, and there is a gap between two adjacent battery cells;

[0008] The board body is provided with a plurality of oil holes; in the thickness direction of the board body, the oil holes penetrate the two surfaces of the board body; the plurality of oil holes correspond to the plurality of gaps between the plurality of battery cells.

[0009] Optionally, the multiple groups of oil holes include multiple rows of transverse oil holes spaced apart along the length direction of the bearing surface; the spacing between two adjacent rows of transverse oil holes corresponds to the spacing of the transverse gap spaces between the multiple battery cells.

[0010] Optionally, each row of transverse oil holes includes a plurality of through holes arranged at intervals along the width direction of the bearing surface.

[0011] Optionally, each row of transverse oil holes includes at least one long through hole extending along the width direction of the bearing surface.

[0012] Optionally, the multiple groups of oil holes include multiple columns of longitudinal oil holes spaced apart along the width direction of the bearing surface; the spacing between two adjacent columns of longitudinal oil holes corresponds to the spacing of the longitudinal gap spaces between multiple battery cells; each column of longitudinal oil holes includes multiple through holes spaced apart along the length direction of the bearing surface.

[0013] Optionally, the size of the oil hole is greater than the width of the gap space between the battery cells.

[0014] Optionally, two opposite guide parts are provided on both sides of the width direction of the plate body, and the guide parts extend along the length direction of the plate body; the multiple groups of oil holes are located between the two guide parts; the guide parts and the bearing surface are respectively located on both sides of the thickness direction of the plate body.

[0015] Optionally, the plate body is provided with a positioning hole on the guide portion; and in the thickness direction of the plate body, the positioning hole passes through two surfaces of the plate body.

[0016] Optionally, two opposite side oil holes are provided on both sides of the width direction of the plate body; the side oil holes extend along the length direction of the plate body; in the thickness direction of the plate body, the side oil holes penetrate the two surfaces of the plate body; the side oil holes correspond to the gap space between the battery cell assembly and the warehouse wall of the immersion warehouse.

[0017] These features and advantages of the present invention will be detailed in the following detailed description and accompanying drawings. The preferred embodiments or means of the present invention will be fully illustrated in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of the present invention. Furthermore, although multiple features, elements, and components may be present and are labeled with different symbols or numbers for convenience, they all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Figure 1 Schematic diagram of the fixed plate structure of the liquid-cooled energy storage battery in some embodiments.

[0020] Figure 2 Schematic diagram of the structure of the liquid-cooled energy storage battery in some embodiments.

[0021] Figure 3 1 is a top view of a fixing plate of a liquid-cooled energy storage battery in some embodiments.

[0022] Figure 4 Schematic diagram of the structure of the fixing plate and battery cell assembly of the liquid-cooled energy storage battery in some embodiments, showing the corresponding relationship between the oil holes and the gap space between the battery cells.

[0023] Figure 5 for Figure 4 Cross-sectional view along the A-A direction.

[0024] Figure 6 Schematic diagram of the structure of the fixing plate and battery cell assembly of the liquid-cooled energy storage battery in some embodiments, showing the corresponding relationship between the longitudinal oil holes and the gap space between the battery cells.

[0025] Figure 7 Schematic diagram of the structure of the liquid-cooled immersion chamber described in some embodiments (the chamber door is omitted).

[0026] Among them, 100, plate body; 110, bearing surface; 200, oil hole; 210, horizontal oil hole; 212, long through hole; 220, longitudinal oil hole; 310, guide part; 320, positioning hole; 400, side oil hole; 510, battery cell; 600, immersion chamber; 610, angle steel. DETAILED DESCRIPTION

[0027] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described in the embodiments are intended to explain the present invention and are not to be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more, and "a number of" means one or more.

[0031] References in this specification to "one embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment disclosed herein. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0032] Example:

[0033] This embodiment provides a liquid-cooled energy storage battery, including a fixing plate and a plurality of battery cells. The plurality of battery cells are arranged in multiple rows and columns. There is a gap between adjacent battery cells, and the gaps between the columns and the gaps between the rows intersect and connect in two different directions.

[0034] The liquid-cooled energy storage battery is placed in the liquid-cooled immersion chamber 600 of the immersion-cooled energy storage battery cabinet when in use. Figure 7 The liquid-cooled immersion chamber 600 is used to accommodate multiple liquid-cooled energy storage batteries placed in layers. The battery cell assembly of each liquid-cooled energy storage battery is composed of multiple battery cells. Figure 2 Multiple pairs of guide rails 610 are installed on two opposing walls of the liquid-cooled immersion chamber 600, with the multiple pairs of guide rails 610 spaced sequentially from top to bottom. Multiple fixing plates for multiple liquid-cooled energy storage batteries can be inserted from top to bottom between the corresponding pairs of guide rails 610 and secured. The fixing plates divide the liquid-cooled immersion chamber 600 into multiple layers, each of which houses a corresponding battery cell assembly.

[0035] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the fixed plate includes a plate body 100. The plate body 100 has a certain thickness, length and width, the thickness direction is shown as the z-axis in the figure, the length direction is shown as the y-axis in the figure, and the width direction is shown as the x-axis in the figure. It has two opposite surfaces in the thickness direction, one of which can serve as a bearing surface 110 for the battery cell assembly when it is placed upward, and the bearing surface 110 is usually fixed. The bearing surface 110 has a width that is compatible with the size of the warehouse wall of the immersion chamber 600. The opening of the immersion chamber 600 is located on one side of the immersion chamber 600, and the distance between the opposite warehouse walls on both sides of the opening is the approximate width of the bearing surface 110, which is also the approximate width of the plate body 100, so that the horizontally placed plate body 100 can be inserted into the immersion chamber 600 from the opening of the immersion chamber 600. The width direction of the immersion chamber 600 is shown in FIG. Figure 7 The x-axis direction in .

[0036] The plate body 100 is provided with a plurality of oil holes 200. In the thickness direction of the plate body 100, the oil holes 200 penetrate the two surfaces of the plate body 100. The plurality of oil holes 200 correspond to the plurality of gaps between the plurality of battery cells 510 of the battery cell assembly. The gaps between the battery cells 510 refer to Figure 5 According to the width and length of each battery cell 510 and the gap between two adjacent battery cells 510, the number, position, spacing, width and length of the multiple groups of oil holes 200 on the board body 100 can be flexibly designed without limitation.

[0037] The fixed plate is designed to have a structure with multiple groups of oil holes 200 corresponding to multiple gap spaces between multiple battery cells 510. When it is set inside the immersion chamber 600, the cooling oil below the plate body 100 can directly float up to the gap spaces between the battery cells above the plate body 100 through the oil holes 200, so that the cooling oil can directly contact the surface of the battery cells 510, and the cooling oil passing through the oil holes 200 is fully in contact with the surface of each battery cell 510, thereby greatly improving the heat exchange capacity between the two. Compared with the existing fixed plate without oil holes 200, the resistance and distance of the floating of the lower layer of cooling oil to the upper layer are reduced, so its circulation speed in the immersion chamber 600 is improved. The increase in circulation speed can take away more heat, and correspondingly improve the overall heat dissipation effect.

[0038] In some embodiments, the plurality of groups of oil holes 200 include a plurality of rows of transverse oil holes 210 spaced apart along the length direction of the bearing surface 110. The spacing between two adjacent rows of transverse oil holes 210 corresponds to the spacing between the transverse gaps between the plurality of battery cells. Figure 1As shown, the y direction in the figure is the length direction of the bearing surface 110, and the multiple rows of transverse oil holes 210 are multiple oil holes 200 extending along the width direction of the plate body 100 (the x-axis direction in the figure). The transverse gap space extends along the width direction of the plate body 100.

[0039] In some embodiments, each row of transverse oil holes includes at least one long through hole 212 extending along the width direction of the bearing surface 110. Figure 3 As shown in FIG, each row of transverse oil holes 210 includes a long through hole 212. Figure 6 As shown in the figure, each row of transverse oil holes 210 includes two elongated through holes 212 of equal length. The two elongated through holes 212 are collinear but not continuous, and there is a gap between them.

[0040] In other alternative embodiments, each row of transverse oil holes 210 includes multiple through holes spaced apart along the width of the bearing surface 110. The multiple through holes have the same diameter and are typically circular or square, or a combination of both. By reducing the maximum length of the transverse oil holes 210 but increasing the number of through holes, the same effect as the elongated through holes 212 can be achieved.

[0041] In some embodiments, the multiple groups of oil holes 200 include multiple rows of longitudinal oil holes 220 spaced apart along the width direction of the bearing surface 110. The spacing between two adjacent rows of longitudinal oil holes 220 corresponds to the spacing between the multiple longitudinal gap spaces between the multiple battery cells. Each row of longitudinal oil holes 220 includes multiple through holes spaced apart along the length direction of the bearing surface 110. The multiple rows of longitudinal oil holes 220 are multiple oil holes 200 arranged along the length direction of the board body 100 (x-axis direction in the figure). The longitudinal gap spaces extend along the length direction of the board body 100.

[0042] like Figure 6 As shown, three rows of longitudinal oil holes 220 are shown, each row of longitudinal oil holes 220 includes thirteen circular through holes arranged along the length of the board body 100. Each circular through hole corresponds to a gap space between the longitudinal battery cells 510.

[0043] In some embodiments, the size of the oil hole 200 is larger than the width of the gap between the battery cells 510 of the battery cell assembly. This configuration allows more cooling oil to pass through the oil hole 200, thereby improving the heat dissipation effect on the battery cells 510.

[0044] In some embodiments, two opposing guide portions 310 are provided on either side of the plate body 100 in the width direction. The guide portions 310 extend along the length of the plate body 100. The multiple groups of oil holes 200 are located between the two guide portions 310. The guide portions 310 and the bearing surface 110 are located on either side of the plate body 100 in the thickness direction.

[0045] like Figure 1 As shown, the guide portion 310 is a groove provided on both sides of the bottom surface of the board body 100, and the groove can be adapted to the guide rail 610 on the wall of the immersion chamber 600. On the one hand, the guide rail 610 can facilitate the insertion of the board body 100 and the battery cell assembly located on the board body 100 into the immersion chamber 600. On the other hand, the guide rail 610 and the side wall of the groove are used for limiting, thereby preventing the displacement of the board body 100 in the width direction to a certain extent.

[0046] In some embodiments, the panel body 100 is provided with positioning holes 320 on the guide portion 310. These positioning holes 320 extend through both surfaces of the panel body 100 in the thickness direction. The guide rails 610 on the wall of the immersion chamber 600 are also provided with through-holes of corresponding size. When the panel body 100 is inserted into a predetermined position within the immersion chamber 600, latches or bolts, such as those inserted into the through-holes of the panel body 100 and the guide rails 610, are inserted to secure the panel body 100 and prevent movement.

[0047] In some embodiments, as Figure 1 As shown, two opposite side oil holes 400 are provided on both sides of the width direction of the board body 100. The side oil holes 400 extend along the length direction of the board body 100. In the thickness direction of the board body 100, the side oil holes 400 penetrate both surfaces of the board body 100. The side oil holes 400 correspond to the gap space between the battery cell and the wall of the immersion chamber 600. The side oil holes 400 on each side include a plurality of elongated holes, the length direction of the elongated holes is the same as the length direction of the board body 100, and the plurality of elongated holes are collinear and spaced apart.

[0048] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are included within the scope of the claims.

Claims

1. A liquid-cooled energy storage battery, comprising a fixing plate and a plurality of battery cells; the fixing plate comprises a plate body (100), the plate body (100) having a bearing surface and a bottom surface opposite to each other in a thickness direction thereof, the plurality of battery cells being arranged on the bearing surface, the bearing surface (110) having a width adapted to the size of a wall of an immersion tank (600), characterized in that: The multiple battery cells are arranged in multiple rows and columns, and there is a gap between two adjacent battery cells; The plate body (100) is provided with a plurality of groups of oil holes (200); in the thickness direction of the plate body (100), the oil holes (200) penetrate two surfaces of the plate body (100); and the plurality of groups of oil holes (200) correspond to a plurality of gap spaces between a plurality of battery cells (510).

2. The liquid-cooled energy storage battery according to claim 1, characterized in that: The multiple groups of oil holes (200) include multiple rows of transverse oil holes (210) spaced apart along the length direction of the bearing surface (110); the spacing between two adjacent rows of transverse oil holes (210) corresponds to the spacing of the transverse gap spaces between the multiple battery cells.

3. The liquid-cooled energy storage battery according to claim 2, characterized in that: Each row of transverse oil holes (210) includes a plurality of through holes arranged at intervals along the width direction of the bearing surface (110).

4. The liquid-cooled energy storage battery according to claim 2, characterized in that: Each row of transverse oil holes includes at least one long through hole (212) extending along the width direction of the bearing surface (110).

5. The liquid-cooled energy storage battery according to claim 2, characterized in that: The multiple groups of oil holes (200) include multiple rows of longitudinal oil holes (220) spaced apart in the width direction of the bearing surface (110); the spacing between two adjacent rows of longitudinal oil holes (220) corresponds to the spacing of the longitudinal gap spaces between the multiple battery cells; and each row of longitudinal oil holes (220) includes multiple through holes spaced apart and arranged in the length direction of the bearing surface (110).

6. The liquid-cooled energy storage battery according to any one of claims 1 to 5, characterized in that: The size of the oil hole (200) is greater than the width of the gap space between the battery cells.

7. The liquid-cooled energy storage battery according to any one of claims 1 to 5, characterized in that: Two opposite guide portions (310) are provided on both sides of the plate body (100) in the width direction, and the guide portions (310) extend along the length direction of the plate body (100); the multiple groups of oil holes (200) are located between the two guide portions (310); and the guide portions (310) and the bearing surface (110) are respectively located on both sides of the plate body (100) in the thickness direction.

8. The liquid-cooled energy storage battery according to claim 7, characterized in that: The plate body (100) is provided with a positioning hole (320) on the guide portion (310); in the thickness direction of the plate body (100), the positioning hole (320) penetrates two surfaces of the plate body (100).

9. The liquid-cooled energy storage battery according to any one of claims 1 to 5, characterized in that: Two opposite side oil holes (400) are provided on both sides of the plate body (100) in the width direction; the side oil holes (400) extend along the length direction of the plate body (100); in the thickness direction of the plate body (100), the side oil holes (400) penetrate the two surfaces of the plate body (100); the side oil holes (400) correspond to the gap space between the battery cell and the wall of the immersion chamber (600).

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