A marine surrounded load-bearing battery pack liquid cooling plate

Abstract

The utility model discloses a marine surrounding load bearing type battery pack liquid cooling plate relates to battery technical field, the marine surrounding load bearing type battery pack liquid cooling plate includes: liquid cooling heat exchange board and closes the border, the liquid cooling heat exchange board four around are equipped with the weld bead, be equipped with crossbeam and stringer in the closed border, crossbeam with the stringer both ends respectively with two opposite sides of closed border fixed connection, the closed border bottom with weld bead seal welding, the utility model discloses through the closed border bottom with weld bead seal welding to reduce the risk of battery damp, waterlogging.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a marine-use enclosed load-bearing liquid cooling plate for battery packs. Background Technology

[0002] Currently, with the widespread promotion and application of electric ships, batteries are increasingly used in vessels. Marine battery packs, as the most basic energy unit in marine applications, directly affect the overall performance of electric ships. Currently, most marine battery packs on the market adopt a battery-supported liquid-cooled structure with a steel outer shell and nested liquid-cooled plates. This results in a relatively large overall weight and low energy density, significantly reducing the ship's range. Furthermore, ships have unique operating conditions, such as tilting, rolling, moisture, splashing water, and flooding of the cabin. Therefore, the structural protection and bottom sealing of the battery pack are particularly critical. For structural protection, the steel outer shell and nested liquid-cooled plates utilize sealing strips.

[0003] However, while sealing strips can achieve a sealing effect in a short time, the risk of batteries getting damp or submerged in water is extremely high given the 10-year overhaul warranty period for marine applications. Utility Model Content

[0004] This invention provides a marine-grade enclosed load-bearing liquid cooling plate for battery packs, which can solve the problems of short sealing cycle of sealing strips and batteries being susceptible to moisture and water immersion.

[0005] This utility model embodiment provides a marine-grade enclosed load-bearing battery pack liquid cooling plate, which includes: A liquid-cooled heat exchange plate, wherein weld beads are provided around the liquid-cooled heat exchange plate; The enclosing frame has a horizontal beam and a vertical beam inside. The two ends of the horizontal beam and the vertical beam are respectively fixedly connected to the two opposite sides of the enclosing frame. The bottom of the enclosing frame is sealed and welded to the weld bead.

[0006] In one implementation, it further includes: Multiple second locking elements are provided at the bottom of the enclosure frame and in the weld bead to strengthen the connection between the bottom of the enclosure frame and the weld bead.

[0007] In one implementation, it further includes: The top cover is a rectangular box with an opening at the bottom and a locking edge at the edge of the opening. The upper cover fits over the top of the enclosing frame.

[0008] In one implementation, it further includes: Multiple first locking elements; The locking edge is provided with multiple locking holes; The top of the enclosing frame is provided with multiple threaded holes corresponding to the multiple locking holes; Multiple first locking elements pass through multiple locking holes one by one to lock the top cover to the top of the surrounding frame.

[0009] In one embodiment: the enclosing frame is AL6061 high-strength hollow tubular aluminum alloy.

[0010] In one embodiment: the bottom of the enclosing frame and the weld bead are fully sealed by friction stir welding.

[0011] In one embodiment: there are multiple crossbeams, some of which are fixedly connected to the longitudinal beams.

[0012] In one embodiment: the second locking member is a rivet, and the outer diameter of the rivet is smaller than the thickness of the surrounding frame and the width of the weld bead.

[0013] In one embodiment: the crossbeam and the longitudinal beam are used to mount the battery pack.

[0014] In one embodiment, the liquid-cooled heat exchange plate is further provided with a first inlet / outlet and a second inlet / outlet.

[0015] This utility model discloses a marine-grade enclosed load-bearing battery pack liquid cooling plate, comprising: a liquid cooling heat exchange plate with welded seams around its perimeter; and an enclosing frame with crossbeams and longitudinal beams inside. The ends of the crossbeams and longitudinal beams are fixedly connected to two opposite sides of the enclosing frame, and the bottom of the enclosing frame is sealed to the welded seams. This utility model reduces the risk of battery moisture and water immersion by sealing the bottom of the enclosing frame with the welded seams. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a first exploded view of the marine enclosed load-bearing battery pack liquid cooling plate according to an embodiment of the present invention; Figure 2 This is a second exploded view of the marine enclosed load-bearing battery pack liquid cooling plate according to an embodiment of the present invention; Figure 3 This is a view of the enclosing frame of the marine-mounted battery pack liquid cooling plate according to an embodiment of the present utility model; Figure 4This is a battery pack diagram of a marine-mounted, enclosed, load-bearing battery pack liquid cooling plate according to an embodiment of this utility model; Figure 5 This is a top cover view of the marine-mounted enclosed load-bearing battery pack liquid cooling plate according to an embodiment of the present utility model; Figure 6 This is a diagram of the liquid-cooled heat exchange plate of the marine-mounted enclosed battery pack liquid-cooled plate according to an embodiment of the present invention.

[0018] In the diagram: 100, top cover; 110, locking edge; 120, locking hole; 200, surrounding frame; 210, crossbeam; 220, longitudinal beam; 230, threaded hole; 300, liquid-cooled heat exchange plate; 310, weld bead; 320, first inlet / outlet; 330, second inlet / outlet; 400, battery pack; 510, first locking element; 520, second locking element. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] With the widespread adoption and application of electric ships, batteries are increasingly used in vessels. Marine battery packs, as the most basic energy unit in marine applications, directly impact the overall performance of electric ships. Currently, most marine battery packs on the market employ a liquid-cooled battery-supported structure with a steel outer shell and nested liquid-cooled plates. This results in a relatively large overall weight and low energy density, significantly reducing the ship's range. Furthermore, ships operate under unique conditions such as tilting, rolling, humidity, splashing water, and flooding of the cabin, making structural protection and bottom sealing of the battery pack crucial. While the steel outer shell and nested liquid-cooled plates provide structural protection using sealing strips, achieving a temporary seal, the risk of subsequent moisture and flooding remains extremely high given the 10-year overhaul warranty period for marine applications.

[0021] like Figure 1 , 2 As shown in Figure 3, this utility model discloses a marine-use enclosed load-bearing battery pack liquid cooling plate, which includes: a liquid cooling heat exchange plate 300, the liquid cooling heat exchange plate 300 having welds 310 around its perimeter; an enclosing frame 200, the enclosing frame 200 having a crossbeam 210 and a longitudinal beam 220 inside, the two ends of the crossbeam 210 and the longitudinal beam 220 being fixedly connected to two opposite sides of the enclosing frame 200 respectively, and the bottom of the enclosing frame 200 being sealed and welded to the welds 310.

[0022] The liquid-cooled heat exchange plate 300 is a planar plate structure with raised weld beads around its perimeter. The weld beads are fixedly connected to the upper surface of the liquid-cooled heat exchange plate 300, and the connection is sealed.

[0023] The cross-section of the enclosing frame 200 corresponds to the weld bead, and the bottom of the enclosing frame 200 is sealed and welded to the weld bead.

[0024] Ships travel on water for extended periods, and equipment is constantly exposed to high humidity. There are also risks of tilting, swaying, water splashing, and water immersion in the cabin. If the sealing performance is poor, the battery pack is susceptible to moisture and water immersion, which can affect its service life.

[0025] This invention increases the sealing performance of the liquid cooling plate of the marine-grade enclosed load-bearing battery pack by sealing the bottom of the enclosed frame with the weld bead, thus reducing the risk of the battery getting damp or submerged in water.

[0026] Furthermore, the enclosing frame 200 is internally provided with crossbeams 210 and longitudinal beams 220. The crossbeams 210 and longitudinal beams 220 are used to install the battery pack 400. Since the marine battery pack 400 is very heavy, if it is placed directly on the liquid-cooled heat exchange plate 300, it may deform the liquid-cooled heat exchange plate 300. By adding crossbeams 210 and longitudinal beams 220 to support the weight of the battery pack, the weight of the battery pack 400 can be transferred to the hull through the enclosing frame 200, reducing the risk of the liquid-cooled heat exchange plate 300 being crushed. In addition, the internal crossbeams 210 and longitudinal beams 220 also increase the strength of the enclosing frame 200.

[0027] like Figure 2 As shown, in one embodiment, it also includes: a plurality of second locking members 520, which are disposed at the bottom of the enclosing frame 200 and the weld 310, for strengthening the connection strength between the bottom of the enclosing frame 200 and the weld 310.

[0028] This utility model adds multiple second locking components at the connection between the surrounding frame and the weld, thereby strengthening the connection and ensuring that the weld is not prone to detachment or leakage.

[0029] like Figure 1 , 5 As shown, in one embodiment, it further includes: a top cover 100, which is a cuboid box with an opening at the bottom and a locking edge 110 at the edge of the opening; the top cover 100 is closed to the top of the enclosing frame 200.

[0030] During installation, first weld the surrounding frame 200 to the welds 310 around the liquid-cooled heat exchange plate 300, then install the battery pack 400 onto the crossbeam 210 and the longitudinal beam 220, and then close the top cover 100 onto the top of the surrounding frame 200 to seal the battery pack 400.

[0031] This invention further ensures that the working environment of the battery pack 400 is dry by sealing the battery pack 400 with the top cover 100.

[0032] like Figure 1 , 2 As shown, in one embodiment, it further includes: a plurality of first locking members 510; a plurality of locking holes 120 are provided on the locking edge 110; a plurality of threaded holes 230 are provided on the top of the enclosing frame 200 corresponding to the plurality of locking holes 120; the plurality of first locking members 510 pass through the plurality of locking holes 120 one by one to lock the top cover 100 to the top of the enclosing frame 200.

[0033] The top cover 100 is closed onto the top of the enclosure frame 200. The multiple locking holes 120 on the locking edge 110 correspond one-to-one with the multiple threaded holes 230 on the top of the enclosure frame 200. The top cover 100 can be locked onto the top of the enclosure frame 200 by multiple first locking parts 510.

[0034] This utility model uses multiple locking holes on the locking edge and multiple threaded holes on the top of the enclosure frame to close the top cover onto the enclosure frame with multiple first locking parts, which increases the stability of the cover and makes it less likely for the top cover to fall off.

[0035] Furthermore, in order to increase the sealing between the top cover 100 and the top of the surrounding frame 200, a sealing gasket can be added between the top cover 100 and the top of the surrounding frame 200.

[0036] Furthermore, multiple nuts can be pre-set on the top of the enclosure frame 200, with each nut corresponding to a different locking hole 120 on the locking edge 110. When the cover is closed, the nuts pass through the corresponding locking holes 120 and are then secured with nuts. The top cover 100 and the enclosure frame 200 of this invention can be fixed in one of several ways, as long as a seal between the top cover 100 and the enclosure frame 200 is achieved.

[0037] like Figure 3 As shown, in one embodiment, the enclosing frame 200 is made of AL6061 high-strength hollow tubular aluminum alloy.

[0038] Currently, most marine battery packs on the market use a liquid-cooled battery structure with a steel outer shell and a nested liquid-cooled plate. This results in a relatively large overall weight and low energy density, significantly reducing the vessel's cruising range. By replacing the steel outer shell with a high-strength hollow tubular aluminum alloy, the energy density is greatly increased. Furthermore, the strength of the enclosing frame 200 is enhanced by incorporating crossbeams 210 and longitudinal beams 220 within the frame, ensuring its load-bearing capacity. This utility model utilizes a large area of ​​aluminum in its enclosing frame and liquid-cooled heat exchange plate, reducing the weight by approximately 12% compared to traditional all-steel marine battery pack liquid-cooled load-bearing structures, thus meeting the lightweight requirements for battery-powered marine applications. A steel marine battery pack frame structure of the same volume weighs approximately 32 kg, while this structure weighs approximately 14 kg. The energy density of a battery pack of the same specifications is increased by more than 10%.

[0039] In one embodiment, the bottom of the enclosing frame 200 and the weld bead 310 are fully sealed by friction stir welding.

[0040] This invention utilizes friction stir welding for full welding. This welding method uses the rotating friction of the stirring head to plasticize the material rather than melt it, avoiding defects such as porosity and hot cracks in traditional fusion welding, and further enhancing the sealing performance of the connection between the bottom of the enclosing frame and the weld bead.

[0041] like Figure 3 As shown, in one embodiment, there are multiple crossbeams 210, some of which are fixedly connected to the longitudinal beams 220.

[0042] To accommodate the weight of the battery pack, multiple crossbeams 210 can be installed inside the enclosure frame 200 to support the battery pack.

[0043] like Figure 2 , 6 As shown, in one embodiment, the second locking member is a rivet, and the outer diameter of the rivet is smaller than the thickness of the surrounding frame 200 and the width of the weld bead 310.

[0044] To strengthen the connection between the enclosure frame 200 and the liquid-cooled heat exchange plate 300, the enclosure frame 200 and the liquid-cooled heat exchange plate 300 are secondary fixed at the connection point by riveting. The outer diameter of the riveting is smaller than the thickness of the enclosure frame 200 and the width of the weld bead 310. This ensures that when making the hole, it remains inside the weld joint, and when fixed by riveting, the enclosure frame 200 and the liquid-cooled heat exchange plate 300 always maintain a weld seal, without affecting the sealing performance of the connection point.

[0045] This invention increases the strength of the connection by adding rivets at the junction of the enclosing frame and the liquid-cooled heat exchange plate.

[0046] like Figure 4 As shown, in one embodiment, the crossbeam 210 and the longitudinal beam 220 are used to mount the battery pack 400.

[0047] like Figure 2 , 6 As shown, in one embodiment, the liquid-cooled heat exchange plate 300 is further provided with a first inlet / outlet 320 and a second inlet / outlet 330.

[0048] The liquid-cooled heat exchange plate 300 has a multi-layer structure, including a flow channel plate, a support plate, a lower guard plate, a first inlet / outlet 320, and a second inlet / outlet 330. The flow channel plate is integrally stamped, forming a connecting tubular flow channel, which is connected to the first inlet / outlet 320 and the second inlet / outlet 330, respectively. The flow channel plate has pre-reserved riveting areas of a certain width in the middle longitudinal direction and around the perimeter. These riveting areas are used to support the surrounding frame 200 and the longitudinal beam 220. The riveting areas also have riveting holes, which are used to rivet the surrounding frame 200 and the longitudinal beam 220 together.

[0049] This invention regulates the battery pack's operating temperature by incorporating a connecting tubular flow channel and increases the connection strength between the liquid-cooled heat exchange plate and the surrounding frame and longitudinal beams by adding a riveting area. The riveting area also supports the surrounding frame and longitudinal beams, protecting the liquid-cooled heat exchange plate from being squeezed and deformed.

[0050] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0051] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A marine-grade enclosed load-bearing liquid cooling plate for battery packs, characterized in that, It includes: A liquid-cooled heat exchange plate (300) is provided with weld beads (310) around its perimeter. The enclosing frame (200) is provided with a crossbeam (210) and a longitudinal beam (220) inside the enclosing frame (200). The two ends of the crossbeam (210) and the longitudinal beam (220) are respectively fixedly connected to the two opposite sides of the enclosing frame (200). The bottom of the enclosing frame (200) is sealed and welded to the weld (310).

2. The marine-grade enclosed load-bearing liquid cooling plate for battery packs according to claim 1, characterized in that, Also includes: Multiple second locking elements (520) are provided at the bottom of the enclosure frame (200) and in the weld (310) to strengthen the connection between the bottom of the enclosure frame (200) and the weld (310).

3. The marine-grade enclosed load-bearing liquid cooling plate for battery packs according to claim 1, characterized in that, Also includes: The top cover (100) is a cuboid box with an opening at the bottom and a locking edge (110) at the edge of the opening. The top cover (100) covers the top of the enclosing frame (200).

4. A marine-grade enclosed load-bearing liquid cooling plate for battery packs according to claim 3, characterized in that, Also includes: Multiple first locking elements (510); The locking edge (110) is provided with a plurality of locking holes (120); The top of the enclosing frame (200) is provided with a plurality of threaded holes (230) corresponding to the plurality of locking holes (120); Multiple first locking elements (510) pass through multiple locking holes (120) one by one to lock the top cover (100) to the top of the surrounding frame (200).

5. A marine-grade enclosed load-bearing liquid cooling plate for battery packs according to claim 1, characterized in that: The enclosing frame (200) is made of AL6061 high-strength hollow tubular aluminum alloy.

6. A marine-grade enclosed load-bearing liquid cooling plate for battery packs according to claim 1, characterized in that: The bottom of the enclosing frame (200) and the weld (310) are fully sealed by friction stir welding.

7. A marine-grade enclosed load-bearing liquid cooling plate for battery packs according to claim 1, characterized in that: There are multiple crossbeams (210), some of which are fixedly connected to the longitudinal beams (220).

8. A marine-grade enclosed load-bearing liquid cooling plate for battery packs according to claim 2, characterized in that: The second locking member (520) is a rivet, and the outer diameter of the rivet is smaller than the thickness of the surrounding frame (200) and the width of the weld (310).

9. A marine-grade enclosed load-bearing liquid cooling plate for battery packs according to claim 1, characterized in that: The crossbeam (210) and the longitudinal beam (220) are used to mount the battery pack (400).

10. A marine-grade enclosed load-bearing liquid cooling plate for battery packs according to claim 1, characterized in that: The liquid-cooled heat exchange plate (300) is also provided with a first inlet / outlet (320) and a second inlet / outlet (330).

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