Submerged liquid-cooled battery pack

Abstract

The utility model relates to the technical field of energy storage, especially to submerge liquid cooling battery pack. The submerge liquid cooling battery pack includes the frame structure, second liquid cooling board and first liquid cooling board, the frame structure has the accommodation cavity for accommodating the battery, the lower end of accommodation cavity is equipped with first open mouth, first liquid cooling board is configured to block first open mouth, the upper end surface of first liquid cooling board is configured to support the battery, the upper end surface of first liquid cooling board is provided with the outward extension protruding upwards, outward extension protruding is misaligned with the battery arrangement, the upper end surface of outward extension protruding is equipped with the downward extension through -hole, and the through -hole is communicated with the first liquid cooling flow channel in first liquid cooling board, and first liquid cooling board can along first liquid cooling flow channel and through -hole input the submersion liquid in accommodation cavity and along through -hole and first liquid cooling flow channel discharge the submersion liquid in the accommodation cavity, to realize the basis on the battery submersion heat dissipation, prevent the structure glue for fixing battery and first liquid cooling board and block up first liquid cooling flow channel in first liquid cooling board.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an immersion liquid-cooled battery pack. Background Technology

[0002] There is a growing demand for batteries with high capacity, high energy density, and high energy conversion efficiency. Individual batteries, constrained by production requirements, cannot meet these demands. Therefore, existing technologies have developed battery packs that connect multiple batteries in parallel and series. During use, however, the internal components of these battery packs are prone to overheating, which can lead to thermal runaway in severe cases.

[0003] In related technologies, to solve the heat generation problem of battery packs, a liquid cooling plate is installed inside the battery pack, and the batteries inside the battery pack are attached to the liquid cooling plate. Cooling is achieved through the thermal contact between the liquid cooling plate and the batteries. However, the above heat dissipation method has low efficiency, especially under high-rate battery charging and discharging conditions, where the contact between the liquid cooling plate and the battery pack cannot effectively dissipate heat from the batteries. Therefore, existing technologies provide a solution for immersion liquid-cooled battery packs based on the above liquid cooling plate method. This involves using a casing and a liquid cooling plate to form a sealed space, placing the battery pack inside the sealed space, and fixing the battery pack to the upper surface of the liquid cooling plate with structural adhesive. Through holes are made on the upper surface of the liquid cooling plate to allow immersion liquid to flow into or out of the sealed space. However, in this immersion liquid cooling solution, the structural adhesive used to fix the batteries to the liquid cooling plate extends along the upper surface of the liquid cooling plate and flows into the interior of the liquid cooling plate through the through holes. This not only causes the structural adhesive to block the flow channels inside the liquid cooling plate, affecting the circulation channels of the immersion liquid, but also affects the fixing effect between the battery pack and the liquid cooling plate.

[0004] Therefore, there is an urgent need to invent an immersion liquid-cooled battery pack to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an immersion liquid-cooled battery pack to achieve immersion liquid cooling of the battery, improve the battery's safety and service life, and solve the problem of structural adhesive entering the first liquid cooling channel in the first liquid cooling plate, thus ensuring the normal operation of the immersion liquid-cooled battery pack.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The submersible liquid-cooled battery pack includes:

[0008] The frame structure has a receiving cavity for accommodating the battery, and the lower end of the receiving cavity has a first opening;

[0009] A first liquid cooling plate is configured to block the first opening. The upper surface of the first liquid cooling plate is configured to support the battery. The upper surface of the first liquid cooling plate is provided with an upwardly extending protrusion. The protrusion is offset from the battery. The upper surface of the protrusion is provided with a downwardly extending through hole. The through hole communicates with a first liquid cooling channel in the first liquid cooling plate. The first liquid cooling plate can input the immersion liquid into the receiving cavity along the first liquid cooling channel and the through hole, and discharge the immersion liquid in the receiving cavity along the through hole and the first liquid cooling channel.

[0010] As an optional feature, the submersible liquid-cooled battery pack further includes:

[0011] The second liquid cooling plate has a second opening at the upper end of the receiving cavity that is opposite to the first opening. The second liquid cooling plate is configured to block the second opening. The second liquid cooling plate has a second liquid cooling channel that communicates with the receiving cavity. The second liquid cooling channel is configured to input the immersion liquid into the receiving cavity.

[0012] As an optional embodiment, the first liquid cooling channel has a first liquid inlet and a first liquid outlet, the first liquid inlet being connected to the through hole, the second liquid cooling channel has a second liquid inlet and a second liquid outlet, and the immersion liquid-cooled battery pack has a circulating liquid cooling channel for the immersion liquid circulation channel, the circulating liquid cooling channel including the second liquid inlet, the second liquid cooling channel, the second liquid outlet, the receiving cavity, the through hole, the first liquid inlet, the first liquid cooling channel, and the first liquid outlet, which are connected to each other.

[0013] As an optional solution, the first liquid cooling plate includes a first plate and a second plate that are fastened together from bottom to top. The lower end surface of the first plate is a plane, and the upper end surface of the first plate is provided with a plurality of interconnected first grooves. The second plate blocks the first grooves and forms the first liquid cooling channel. The second plate is provided with the first liquid inlet. The extended protrusion is provided on the upper end surface of the second plate.

[0014] The second liquid cooling plate includes a third plate and a fourth plate that are fastened together from top to bottom. The upper end surface of the third plate is a plane, and the lower end surface of the third plate is provided with multiple interconnected second grooves. The fourth plate blocks the second grooves and forms the second liquid cooling channel. The fourth plate has a second liquid outlet.

[0015] As an optional solution, the enclosure structure includes:

[0016] Two horizontal plates arranged longitudinally opposite each other in a horizontal plane; and

[0017] Two longitudinal plates are arranged laterally opposite each other in a horizontal plane. The transverse plates and the longitudinal plates are fixedly connected and together form the receiving cavity, which has the first opening and the second opening respectively.

[0018] As an optional solution, the enclosure structure further includes:

[0019] A limiting structure is configured to fill the gap between the inner wall of the receiving cavity and the battery.

[0020] As an optional solution, the first liquid cooling plate includes a cooling area and a supporting area. The cooling area is provided with the first liquid cooling channel, and the supporting area is configured to support the battery. A material reduction groove is formed on the lower end face of the supporting area, and the material reduction groove is directly opposite the explosion relief valve on the battery.

[0021] As an optional solution, the outer peripheral wall of the extended protrusion along the vertical direction is provided with a contoured avoidance surface extending along the vertical direction, and the contoured avoidance surface is adapted to the outer peripheral wall of the battery along the vertical direction.

[0022] As an optional feature, the submersible liquid-cooled battery pack further includes:

[0023] A connector configured to securely connect the first liquid cooling plate to the frame structure.

[0024] As an optional feature, the submersible liquid-cooled battery pack further includes:

[0025] A sealing element is used to fill the gap between the first liquid cooling plate and the frame structure.

[0026] The beneficial effects of this utility model are:

[0027] The immersion liquid-cooled battery pack provided by this utility model has a receiving cavity set in the frame structure. A first opening is opened at the lower end of the receiving cavity and the first opening is sealed by a first liquid-cooling plate. The battery is supported by the upper end face of the first liquid-cooling plate, which can achieve sealed reception of the battery in the receiving cavity. By setting a downwardly extending protrusion on the upper end face of the first liquid-cooling plate, the protrusion is staggered with the battery, which can limit and fix the battery along the upper end face of the first liquid-cooling plate. By opening a downwardly extending through hole on the upper end face of the protrusion, the through hole is connected to the first liquid-cooling flow channel of the first liquid-cooling plate, so that the immersion liquid can flow into the receiving cavity in sequence along the first liquid-cooling flow channel and the through hole, and the immersion liquid in the receiving cavity can flow out in sequence along the through hole and the first liquid-cooling flow channel. This can achieve immersion liquid cooling of the battery in the receiving cavity, improve the heat dissipation efficiency of the battery, meet the actual heat dissipation requirements, and improve the safety and service life of the battery. Furthermore, due to the presence of the extended protrusion, the structural adhesive between the upper surface of the first liquid cooling plate and the lower surface of the battery cannot flow into the first liquid cooling channel through the upper opening of the through hole under its own gravity, thereby improving the protection of the first liquid cooling plate and ensuring the normal operation of the submerged liquid-cooled battery pack. Attached Figure Description

[0028] Figure 1 This is a first structural schematic diagram of the immersion liquid-cooled battery pack provided in this embodiment of the present invention;

[0029] Figure 2 This is an exploded schematic diagram of the immersion liquid-cooled battery pack provided in this embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the immersion liquid-cooled battery pack in the state of concealing the second liquid cooling plate provided in the embodiment of this utility model;

[0031] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0032] Figure 5 This is a schematic diagram of the structure of the second liquid cooling plate provided in this embodiment of the present invention;

[0033] Figure 6 This is a cross-sectional schematic diagram of the second liquid cooling plate provided in an embodiment of the present utility model;

[0034] Figure 7 This is a schematic diagram of the structure of the first liquid cooling plate provided in this embodiment of the present invention;

[0035] Figure 8 This is a cross-sectional schematic diagram of the first liquid cooling plate provided in an embodiment of the present utility model;

[0036] Figure 9 yes Figure 8 A magnified view of a section at point B in the middle;

[0037] Figure 10 yes Figure 8 A magnified view of a section at point C;

[0038] Figure 11 This is a schematic diagram of the second structure of the immersion liquid-cooled battery pack provided in this embodiment of the present invention;

[0039] Figure 12 This is a schematic diagram of the frame structure provided in an embodiment of the present utility model.

[0040] In the picture:

[0041] 100. Second liquid cooling plate; 110. Third plate; 111. Second groove; 120. Fourth plate; 121. Second liquid outlet; 122. Second liquid inlet; 130. Second liquid cooling channel; 140. Second fixing hole;

[0042] 200, First liquid cooling plate; 210, First liquid cooling channel; 220, Extended protrusion; 221, Through hole; 222, Contour-shaped clearance surface; 230, First plate body; 231, First groove; 232, Extended portion; 2321, First liquid outlet; 240, Second plate body; 241, First liquid inlet; 250, Material reduction groove; 260, First fixing hole;

[0043] 300. Enclosure frame structure; 310. Horizontal plate; 320. Vertical plate; 330. Limiting structure; 340. Overlapping component; 350. Receiving cavity;

[0044] 400. Connectors;

[0045] 500. Integrated busbar;

[0046] 600. Delivery pipeline;

[0047] 2000, battery. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0049] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0052] In related technologies, to address the overheating problem of battery packs, a liquid cooling plate is installed inside the battery pack, with the batteries inside the pack bonded to the liquid cooling plate. Cooling is achieved through the thermal contact between the liquid cooling plate and the batteries. However, this cooling method has low efficiency, especially under high-rate battery charging and discharging conditions, where the bonded cooling plate to the battery pack cannot effectively dissipate heat from the batteries.

[0053] To solve the above problems, such as Figures 1-10As shown, this embodiment provides an immersion liquid-cooled battery pack. The immersion liquid-cooled battery pack includes a first liquid-cooling plate 200, a second liquid-cooling plate 100, and a frame structure 300. The frame structure 300 has a receiving cavity 350 for accommodating a battery 2000. A first opening is formed at the lower end of the receiving cavity 350. The first liquid-cooling plate 200 is configured to seal the first opening. The upper end surface of the first liquid-cooling plate 200 is configured to support the battery 2000. An upwardly extending protrusion is provided on the upper end surface of the first liquid-cooling plate 200. 220, the extension protrusion 220 is staggered with the battery 2000, and the upper end face of the extension protrusion 220 is provided with a downward extending through hole 221. The through hole 221 is connected to the first liquid cooling channel 210 in the first liquid cooling plate 200. The first liquid cooling plate 200 can input the immersion liquid into the receiving cavity 350 along the first liquid cooling channel 210 and the through hole 221, and discharge the immersion liquid in the receiving cavity 350 along the through hole 221 and the first liquid cooling channel 210.

[0054] This submersible liquid-cooled battery pack achieves sealed containment of the battery 2000 within the housing cavity 350 by providing a receiving cavity 350 within the frame structure 300, opening a first opening at the lower end of the receiving cavity 350 and sealing the first opening with a first liquid-cooling plate 200, and supporting the battery 2000 with the upper end face of the first liquid-cooling plate 200. Furthermore, by providing a downwardly extending protrusion 220 on the upper end face of the first liquid-cooling plate 200, and staggering the protrusion 220 with the battery 2000, the battery 2000 can be fixed and positioned along the upper end face of the first liquid-cooling plate 200. An extending through-hole 221 is formed on the upper surface of the extended protrusion 220, connecting the through-hole 221 to the first liquid cooling channel 210 of the first liquid cooling plate 200. This allows the immersion liquid to flow into the receiving cavity 350 sequentially along the first liquid cooling channel 210 and the through-hole 221, and the immersion liquid in the receiving cavity 350 to flow out sequentially along the through-hole 221 and the first liquid cooling channel 210. This enables immersion liquid cooling of the battery within the receiving cavity 350, improving the heat dissipation efficiency of the battery 2000, meeting actual heat dissipation requirements, and enhancing the safety and lifespan of the battery 2000. Furthermore, due to the presence of the extended protrusion 220, the structural adhesive between the upper surface of the first liquid cooling plate 200 and the lower surface of the battery cannot flow into the first liquid cooling channel 210 through the upper opening of the through-hole 221 under its own gravity, thus improving the protection of the first liquid cooling plate 200 and ensuring the normal operation of the immersion liquid-cooled battery pack.

[0055] To improve the immersion cooling effect of the battery 2000, in this embodiment, the immersion liquid-cooled battery pack further includes a second liquid-cooling plate 100. The upper end of the receiving cavity 350 has a second opening opposite to the first opening. The second liquid-cooling plate 100 is configured to block the second opening. The second liquid-cooling plate 100 has a second liquid-cooling channel 130 communicating with the receiving cavity 350, and the second liquid-cooling channel 130 is configured to input immersion liquid into the receiving cavity 350. By opening a second opening at the upper end of the receiving cavity 350, and simultaneously blocking the second opening with the second liquid-cooling plate 100, the second liquid-cooling channel 130 within the second liquid-cooling plate 100 inputs immersion liquid from the upper end of the receiving cavity 350 into the receiving cavity 350, thereby improving the efficiency of immersion liquid delivery into the receiving cavity 350. It should be noted that, in this embodiment, to further improve the flow effect of the immersion liquid within the receiving cavity 350, the immersion liquid is only input into the receiving cavity 350 along the second liquid-cooled plate 100 located at the upper end of the receiving cavity 350, and the immersion liquid is only discharged along the first liquid-cooled plate 200 located at the lower end of the receiving cavity 350. In other embodiments, the immersion liquid may also be input into the receiving cavity 350 along both the first liquid-cooled plate 200 and the second liquid-cooled plate 100 simultaneously; this embodiment does not impose specific limitations.

[0056] Specifically, the first liquid cooling channel 210 has a first liquid inlet 241 and a first liquid outlet 2321, with the first liquid inlet 241 communicating with the through hole 221. The second liquid cooling channel 130 has a second liquid inlet 122 and a second liquid outlet 121. The immersion liquid-cooled battery pack has a circulating liquid cooling channel for immersion liquid circulation. The circulating liquid cooling channel includes the second liquid inlet 122, the second liquid cooling channel 130, the second liquid outlet 121, the receiving cavity 350, the through hole 221, the first liquid inlet 241, the first liquid cooling channel 210, and the first liquid outlet 2321, which are communicating with each other. By providing a first liquid cooling channel 210 and a first liquid inlet 241 and a first liquid outlet 2321 respectively connected to the first liquid cooling channel 210 within the first liquid cooling plate 200, the first liquid inlet 241 is connected to the through hole 221. Similarly, by providing a second liquid cooling channel 130 and a second liquid inlet 122 and a second liquid outlet 121 respectively connected to the second liquid cooling channel 130 within the second liquid cooling plate 100, the second liquid outlet 121 is connected to the receiving cavity 350. Thus, a submersible battery pack is formed comprising the connected second liquid inlet 122, the second liquid cooling channel 130, the second liquid outlet 121, the receiving cavity 350, the through hole 221, and the first liquid inlet 2321. The circulating liquid cooling channel, consisting of inlet 241, first liquid cooling channel 210, and first liquid outlet 2321, enables the immersion liquid to enter the circulating liquid cooling channel along the second inlet 122 under the drive of the external circulating cooling drive device. After the immersion liquid flows through the second liquid cooling channel 130, second liquid outlet 121, receiving cavity 350, through hole 221, first liquid inlet 241, first liquid cooling channel 210, and first liquid outlet 2321 in sequence, it flows back to the external circulating cooling drive device. While the second liquid cooling plate 100 and the first liquid cooling plate 200 dissipate heat from the battery 2000, the immersion liquid also immerses and dissipates heat from the battery 2000 in the receiving cavity 350.

[0057] It should be noted that in this embodiment, the diameters of the second liquid outlet 121, the through hole 221, and the first liquid inlet 241 are all 4mm. In other embodiments, the diameters of the second liquid outlet 121, the through hole 221, and the first liquid inlet 241 can be adjusted according to actual needs; this embodiment does not impose specific limitations. Furthermore, to improve the transmission speed of the immersion liquid between the second liquid cooling channel 130 and the receiving cavity 350, the second liquid cooling plate 100 is provided with multiple second liquid outlets 121; to improve the transmission speed of the immersion liquid between the receiving cavity 350 and the first liquid cooling channel 210, the first liquid cooling plate 200 is provided with multiple first liquid inlets 241. Each first liquid inlet 241 is correspondingly provided with an extension protrusion 220, and each extension protrusion 220 has a through hole 221 extending vertically and connecting the receiving cavity 350 and the first liquid inlet 241.

[0058] To improve the horizontal limiting effect of the outer protrusion 220 on the battery 2000, such as Figure 3 and Figure 4 As shown, the outer peripheral wall of the extended protrusion 220 in the vertical direction is provided with a contoured avoidance surface 222 extending in the vertical direction, which is adapted to the outer peripheral wall of the battery 2000 in the vertical direction. In this embodiment, the battery 2000 is a cylindrical battery, and the axial direction of the battery 2000 in the receiving cavity 350 is parallel to the vertical direction. Therefore, the outer peripheral wall of the extended protrusion 220 provided in this embodiment is provided with an arc-shaped contoured avoidance surface 222 extending in the vertical direction, which is adapted to the cylindrical surface of the battery 2000. Furthermore, the outer peripheral wall of the extended protrusion 220 provided in this embodiment has three arc-shaped contoured avoidance surfaces 222 arranged circumferentially on the outer peripheral wall in the vertical direction, so that a single extended protrusion 220 can simultaneously dock with three batteries 2000.

[0059] Furthermore, in this embodiment, two rows of batteries 2000 along the horizontal direction are grouped together, and the immersion liquid-cooled battery pack can accommodate 19 groups of batteries 2000. The first liquid cooling plate 200 is provided with 20 sets of extension protrusions 220 at horizontal intervals. There is a set of extension protrusions 220 between two adjacent groups of batteries 2000. Each group of batteries 2000 includes 13 batteries 2000. Each group of batteries 2000 is fixed in the horizontal direction by two adjacent sets of extension protrusions 220 along the horizontal direction.

[0060] like Figures 5-10 As shown, the first liquid cooling plate 200 includes a first plate 230 and a second plate 240 fastened together from bottom to top. The lower end surface of the first plate 230 is flat, and the upper end surface of the first plate 230 is provided with multiple interconnected first grooves 231. The second plate 240 blocks the first grooves 231 and forms a first liquid cooling channel 210. The second plate 240 has a first liquid inlet 241. An extension protrusion 220 is provided on the upper end surface of the second plate 240. The second liquid cooling plate 100 includes a third plate 110 and a fourth plate 120 fastened together from top to bottom. The upper end surface of the third plate 110 is flat, and the lower end surface of the third plate 110 is provided with multiple interconnected second grooves 111. The fourth plate 120 blocks the second grooves 111 and forms a second liquid cooling channel 130. The fourth plate 120 has a second liquid outlet 121.

[0061] By splitting the first liquid cooling plate 200 into a first plate 230 and a second plate 240 that are fastened together from bottom to top, the lower end face of the first plate 230 is flat, and a first groove 231 is opened on the upper end face of the first plate 230. When the first plate 230 and the second plate 240 are fastened together from bottom to top, the second plate 240 blocks the first groove 231 and together forms the first liquid cooling channel 210. While meeting the requirements for the transmission of immersion liquid, the upper and lower end faces of the first liquid cooling plate 200 are both flat, thus improving the protection of the first liquid cooling plate 200. Similarly, the second liquid cooling plate 100 is disassembled into a third plate 110 and a fourth plate 120 that are fastened together from top to bottom. The upper end face of the third plate 110 is flat, and multiple interconnected second grooves 111 are opened on the lower end face of the third plate 110. When the third plate 110 and the fourth plate 120 are fastened together from top to bottom, the fourth plate 120 blocks the second grooves 111 and together forms the second liquid cooling channel 130. While meeting the requirements for the transmission of immersion liquid, the upper and lower end faces of the second liquid cooling plate 100 are both flat, thus improving the protection of the second liquid cooling plate 100.

[0062] In addition, such as Figure 5 As shown, the fourth plate 120 has a second liquid inlet 122 that communicates with the second liquid cooling channel 130. Figure 7 As shown, the first plate 230 has an extension portion 232, and the extension portion 232 has a first liquid outlet 2321 that communicates with the first liquid cooling channel 210.

[0063] In this embodiment, the thickness of the third plate 110 and the first plate 230 is 10 mm, the thickness of the fourth plate 120 and the second plate 240 is 1 mm, and the groove depth of the second groove 111 and the first groove 231 is 3 mm. In other embodiments, the thickness of the third plate 110 and the first plate 230 can be adjusted arbitrarily within a range greater than 10 mm, the thickness of the fourth plate 120 and the second plate 240 can be adjusted arbitrarily within a range greater than 1 mm, and the groove depth of the second groove 111 and the first groove 231 can be adjusted arbitrarily within a range greater than 3 mm. This embodiment does not impose specific limitations.

[0064] It should be noted that in this embodiment, the third plate 110 and the fourth plate 120 are fixed by brazing, and the first plate 230 and the second plate 240 are fixed by brazing. In other embodiments, the fixing method between the third plate 110 and the fourth plate 120, as well as the fixing method between the first plate 230 and the second plate 240, can be changed according to actual needs.

[0065] As an optional solution, such as Figure 7 , Figure 10 as well as Figure 11 As shown, the first liquid cooling plate 200 includes a cooling area and a supporting area. A first liquid cooling channel 210 is provided in the cooling area. The first plate 230 and the second plate 240 are welded in the supporting area. The supporting area is configured to support the battery 2000. A material reduction groove 250 is provided on the lower end face of the supporting area. The material reduction groove 250 is directly opposite the explosion relief valve on the battery 2000. By setting a cooling area and a support area within the first liquid cooling plate 200, the first liquid cooling channel 210 is located in the cooling area, and the battery 2000 is supported in the support area. This prevents the first liquid cooling plate 200 from being damaged by supporting the battery 2000, thus improving the protection of the first liquid cooling channel 210. By opening a material reduction groove 250 on the lower end face of the support area, the material reduction groove 250 is directly opposite the explosion relief valve on the battery 2000. When the battery experiences thermal runaway and opens the explosion relief valve, because the material reduction groove 250 is directly opposite the explosion relief valve, and the thickness of the first liquid cooling plate 200 sandwiched between the material reduction groove 250 and the explosion relief valve is less than the thickness of the rest of the support area within the first liquid cooling plate 200, the structural strength of the first liquid cooling plate 200 between the material reduction groove 250 and the explosion relief valve is relatively low. Gas overflowing from the battery along the explosion relief valve can break through the first liquid cooling plate 200 between the material reduction groove 250 and the explosion relief valve and be discharged to the outside.

[0066] It should be noted that, in this embodiment, the material reduction groove 250 penetrates the first plate 230 from its lower end face and extends into the second plate 240 from bottom to top, so that only a portion of the second plate 240 exists between the material reduction groove 250 and the explosion relief valve. This ensures that the gas generated after battery thermal runaway can smoothly break through the second plate 240 between the material reduction groove 250 and the explosion relief valve, allowing the gas to be smoothly discharged to the outside. Furthermore, in this embodiment, the bottom of the material reduction groove 250 is also machined with scratches to further facilitate the gas breaking through the second plate 240 along the scratches. In addition, in this embodiment, the material reduction groove 250 is a circular groove with a diameter of 20mm. In other embodiments, the diameter of the circular material reduction groove 250 can be adjusted within the range of 10-30mm according to actual needs; this embodiment does not impose a specific limitation.

[0067] In some embodiments, Figure 1 As shown, the submersible liquid-cooled battery pack includes a connector 400 configured to fix the second liquid-cooled plate 100 to the frame structure 300 and to fix the first liquid-cooled plate 200 to the frame structure 300.

[0068] Specifically, such as Figure 5 and Figure 7As shown, the second liquid cooling plate 100 includes a first fixing area and a first sealing area. The first sealing area includes a welding area and a flow channel area. The welding area is used to weld and fix the third plate 110 and the fourth plate 120. The flow channel area is provided with a second liquid cooling flow channel 130. The first fixing area surrounds the outer periphery of the first sealing area and abuts against the upper end face of the frame structure 300. The first liquid cooling plate 200 includes a second fixing area and a second sealing area. The second sealing area includes a supporting area and a cooling area. The supporting area is used to weld and fix the first plate 230 and the second plate 240. The cooling area is provided with a first liquid cooling flow channel 210. The second fixing area surrounds the outer periphery of the second sealing area. The first fixing area has a second fixing hole 140 that penetrates the third plate 110 and the fourth plate 120. The second fixing area has a first fixing hole 260 that penetrates the first plate 230 and the second plate 240. The connector 400 is a fastening bolt. The fastening bolt passes through the second fixing hole 140 and is fixed together with the frame structure 300 to fix the second liquid cooling plate 100 to the frame structure 300. The fastening bolt passes through the first fixing hole 260 and is fixed together with the frame structure 300 to fix the first liquid cooling plate 200 to the frame structure 300.

[0069] Combination Figure 12 The specific structure of the enclosure structure 300 is described below. The enclosure structure 300 includes two horizontal plates 310 arranged longitudinally opposite each other in the horizontal plane and two vertical plates 320 arranged laterally opposite each other in the horizontal plane. The two horizontal plates 310 and the two vertical plates 320 are fixedly connected by connectors 400 and together form a receiving cavity 350 with open ends in the vertical direction. By splitting the enclosure structure 300 into two horizontal plates 310 and two vertical plates 320, and fixing the horizontal plates 310 and vertical plates 320 together to form the receiving cavity 350, the processing difficulty and production cost of the enclosure structure 300 can be reduced.

[0070] It should be noted that in this embodiment, the upper surfaces of the horizontal plate 310 and the vertical plate 320 are provided with a plurality of third fixing holes at intervals, and the lower surfaces of the horizontal plate 310 and the vertical plate 320 are provided with a plurality of fourth fixing holes at intervals. The first fixing area is provided with a plurality of second fixing holes 140 at intervals, each second fixing hole 140 corresponding to a third fixing hole and a fastening bolt. The second fixing area is provided with a plurality of first fixing holes 260 at intervals, each first fixing hole 260 corresponding to a fourth fixing hole and a fastening bolt. The fastening bolt passes through the second fixing hole 140 and is fixedly connected to the third fixing hole to fix the second liquid cooling plate 100 to the frame structure 300. The fastening bolt passes through the first fixing hole 260 and is fixedly connected to the fourth fixing hole to fix the first liquid cooling plate 200 to the frame structure 300. The operation is simple and the fixing effect is good.

[0071] To ensure a tight seal between the second liquid cooling plate 100 and the frame structure 300, and between the first liquid cooling plate 200 and the frame structure 300, the submersible liquid-cooled battery pack further includes a sealing element. This sealing element is configured to fill the gap between the first fixing area and the upper surface of the frame structure 300, and to fill the gap between the second fixing area and the lower surface of the frame structure 300. It should be noted that in this embodiment, the sealing element is a rubber ring, located inside the fastener, to ensure its sealing effect.

[0072] In other embodiments, a first receiving groove can be formed on the lower end face of the first fixed region. The first receiving groove forms a closed first annular groove along the shape of the frame structure 300. Sealant is filled in the first annular groove. When the second liquid cooling plate 100 is fixed to the frame structure 300, the sealant in the first annular groove can fill the space between the first fixed region and the frame structure 300, thereby sealing the second liquid cooling plate 100 and the frame structure 300. Similarly, a second receiving groove can be formed on the upper end face of the second fixed region, forming a closed second annular groove along the shape of the frame structure 300. Sealant is filled in the second annular groove. When the first liquid cooling plate 200 is fixed to the frame structure 300, the sealant in the second annular groove can fill the space between the second fixed region and the frame structure 300, thereby sealing the first liquid cooling plate 200 and the frame structure 300.

[0073] like Figure 12 As shown, the frame structure 300 also includes a limiting structure 330, which is configured to fill the gap between the inner wall of the receiving cavity 350 and the battery 2000. By filling the gap between the inner wall of the receiving cavity 350 and the battery 2000 with the limiting structure 330, combined with the limiting effect of the extended protrusion 220, the battery 2000 can be fixed and limited within the receiving cavity 350, preventing the battery 2000 from moving freely within the receiving cavity 350. It should be noted that in this embodiment, the limiting structure 330 is foam. Foam is lightweight and easy to cut.

[0074] In an optional embodiment, the frame structure 300 further includes an overlap member 340, which is fixed to the outer wall of the horizontal plate 310. The submersible liquid-cooled battery pack also includes a delivery pipe 600. The second liquid inlet 122 and the first liquid outlet 2321 are respectively connected to the external circulating cooling drive device through the delivery pipe 600. The overlap member 340 is configured to support the delivery pipe 600. By providing the overlap member 340 on the outer wall of the horizontal plate 310, and having the overlap member 340 support the delivery pipe 600 used to connect the second liquid inlet 122 and the external circulating cooling drive device, as well as the first liquid outlet 2321 and the external circulating cooling drive device, the delivery pipe 600 can be accommodated, improving the structural compactness of the submersible liquid-cooled battery pack. It should be noted that in other embodiments, the overlap member 340 can also be provided on the outer wall of the vertical plate 320 or on the outer walls of both the horizontal plate 310 and the vertical plate 320. This embodiment does not impose a specific limitation.

[0075] In addition, sealing rings are provided between the conveying pipe 600 and the second liquid inlet 122, the first liquid outlet 2321 and the external circulation-driven cooling device, so that the protection level between the conveying pipe 600 and the second liquid inlet 122, the first liquid outlet 2321 and the external circulation-driven cooling device is IP68.

[0076] As an optional solution, such as Figure 2 As shown, the submersible liquid-cooled battery pack includes an integrated busbar 500, which is disposed within the receiving cavity 350 and overlaps the battery 2000, being electrically connected to it. By providing the integrated busbar 500 electrically connected to the battery 2000, voltage and temperature information of the battery 2000 can be collected simultaneously with series and parallel connection of the battery 2000, facilitating subsequent monitoring and management of the battery by the battery management system. It should be noted that the specific structure and working principle of the integrated busbar 500 are existing technologies and will not be elaborated upon here.

[0077] In addition, the connector of the integrated busbar 500 extends out of the frame structure 300. To ensure the sealing effect between the connector of the integrated busbar 500 and the frame structure 300, a sealing ring needs to be installed between the connector of the integrated busbar 500 and the frame structure 300, so that the protection level between the connector of the integrated busbar 500 and the frame structure 300 reaches IP68.

[0078] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An immersion-type liquid-cooled battery pack, characterized in that, include: The frame structure (300) has a receiving cavity (350) for accommodating a battery (2000), the lower end of which has a first opening; A first liquid cooling plate (200) is configured to block the first opening. The upper surface of the first liquid cooling plate (200) is configured to support the battery (2000). The upper surface of the first liquid cooling plate (200) is provided with an upwardly extending protrusion (220). The protrusion (220) is offset from the battery (2000). The upper surface of the protrusion (220) has a downwardly extending... A through hole (221) is provided, which is connected to a first liquid cooling channel (210) within the first liquid cooling plate (200). The first liquid cooling plate (200) is capable of feeding immersion liquid into the receiving cavity (350) along the first liquid cooling channel (210) and the through hole (221), and discharging the immersion liquid in the receiving cavity (350) along the through hole (221) and the first liquid cooling channel (210).

2. The immersion liquid-cooled battery pack according to claim 1, characterized in that, The submersible liquid-cooled battery pack also includes: The second liquid cooling plate (100) has a second opening at the upper end of the receiving cavity (350) that is opposite to the first opening. The second liquid cooling plate (100) is configured to block the second opening. The second liquid cooling plate (100) has a second liquid cooling channel (130) that communicates with the receiving cavity (350). The second liquid cooling channel (130) is configured to input the immersion liquid into the receiving cavity (350).

3. The immersion liquid-cooled battery pack according to claim 2, characterized in that, The first liquid cooling channel (210) has a first liquid inlet (241) and a first liquid outlet (2321). The first liquid inlet (241) is connected to the through hole (221). The second liquid cooling channel (130) has a second liquid inlet (122) and a second liquid outlet (121). The immersion liquid-cooled battery pack has a circulating liquid cooling channel for the immersion liquid circulation channel. The circulating liquid cooling channel includes the second liquid inlet (122), the second liquid cooling channel (130), the second liquid outlet (121), the receiving cavity (350), the through hole (221), the first liquid inlet (241), the first liquid cooling channel (210), and the first liquid outlet (2321), which are connected to each other.

4. The immersion liquid-cooled battery pack according to claim 3, characterized in that, The first liquid cooling plate (200) includes a first plate (230) and a second plate (240) that are fastened together from bottom to top. The lower end face of the first plate (230) is flat. The upper end face of the first plate (230) is provided with a plurality of interconnected first grooves (231). The second plate (240) blocks the first grooves (231) and forms the first liquid cooling channel (210). The second plate (240) is provided with the first liquid inlet (241). The extended protrusion (220) is provided on the upper end face of the second plate (240). The second liquid cooling plate (100) includes a third plate (110) and a fourth plate (120) that are fastened together from top to bottom. The upper end surface of the third plate (110) is flat, and the lower end surface of the third plate (110) is provided with a plurality of interconnected second grooves (111). The fourth plate (120) blocks the second grooves (111) and forms the second liquid cooling channel (130). The fourth plate (120) is provided with the second liquid outlet (121).

5. The immersion liquid-cooled battery pack according to claim 2, characterized in that, The frame structure (300) includes: Two horizontal plates (310) are arranged opposite each other along the longitudinal direction in the horizontal plane; and Two longitudinal plates (320) are arranged laterally opposite each other in a horizontal plane. The transverse plate (310) and the longitudinal plate (320) are fixedly connected and together form the receiving cavity (350) having the first opening and the second opening respectively.

6. The immersion liquid-cooled battery pack according to claim 5, characterized in that, The frame structure (300) also includes: A limiting structure (330) is configured to fill the gap between the inner wall of the receiving cavity (350) and the battery (2000).

7. The immersion liquid-cooled battery pack according to any one of claims 1 to 6, characterized in that, The first liquid cooling plate (200) includes a cooling area and a supporting area. The cooling area is provided with the first liquid cooling channel (210). The supporting area is configured to support the battery (2000). The lower end face of the supporting area is provided with a material reduction groove (250). The material reduction groove (250) is directly opposite to the explosion relief valve on the battery (2000).

8. The immersion liquid-cooled battery pack according to any one of claims 1 to 6, characterized in that, The outer peripheral wall of the protrusion (220) in the vertical direction is provided with a contoured avoidance surface (222) extending in the vertical direction, and the contoured avoidance surface (222) is adapted to the outer peripheral wall of the battery (2000) in the vertical direction.

9. The immersion liquid-cooled battery pack according to any one of claims 1 to 5, characterized in that, The submersible liquid-cooled battery pack also includes: A connector (400) configured to fix the first liquid cooling plate (200) to the frame structure (300).

10. The immersion liquid-cooled battery pack according to any one of claims 1 to 5, characterized in that, The submersible liquid-cooled battery pack also includes: A sealing element that fills the gap between the first liquid cooling plate (200) and the frame structure (300).

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