Submerged liquid-cooled battery system and powered device

Abstract

The utility model belongs to the technical field of energy storage battery discloses a kind of immersion liquid cooling battery system and electric equipment.The immersion liquid cooling battery system includes cooling cabinet, module frame and multiple electric core body, cooling cabinet has the cooling inner chamber filled with cooling liquid, cooling cabinet is provided with the installation opening being communicated with cooling inner chamber;The outer wall of module frame is slidably connected to the inner wall of cooling inner chamber, and the module frame is placed in the cooling inner chamber, and the inner chamber of module frame is provided with multiple partitions, which are arranged along the first direction and the third direction, the inner chamber of module frame is divided into multiple installation inner chambers;At least one electric core body is installed in the installation inner chamber, and the two electric core surfaces of the electric core body are oppositely arranged along the third direction, and the electric core pole of the electric core body is located at any end of the electric core body along the second direction.The immersion liquid cooling battery system can improve the cooling effect of the electric core body, improve the use safety and reliability, and is more convenient to maintain.

Description

Technical Field

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

[0002] As a crucial component of the new energy sector, energy storage power stations' operational efficiency and lifespan directly impact the stability and reliability of the entire energy system. Currently, the energy storage field primarily utilizes two technologies for cell temperature control: air cooling and liquid cooling. Air cooling efficiency is limited by the low thermal conductivity and specific heat capacity of air itself, failing to meet the demands for high-efficiency heat dissipation. While cold-plate liquid cooling systems offer superior cooling performance compared to air cooling, they suffer from uneven cooling, affecting battery consistency and overall performance.

[0003] Immersion liquid cooling technology is an advanced battery thermal management solution that completely submerges the battery module in coolant, allowing the cells to directly contact the coolant. This close contact fully utilizes the high thermal conductivity of the coolant, rapidly and efficiently removing heat generated during charging and discharging, ensuring the battery remains within its optimal operating temperature range. It also achieves more uniform heat dissipation, effectively reducing internal temperature differences within the battery module, improving battery safety and stability, and extending battery life. Existing immersion liquid-cooled battery systems, however, involve stacking the cells within the coolant. Due to the compact stacking, if a cell fails, the entire battery system must be completely disassembled for maintenance and replacement, resulting in high maintenance costs.

[0004] Therefore, there is an urgent need to provide a new type of immersion liquid-cooled battery system and electrical equipment to solve the above-mentioned technical problems in the prior art. Utility Model Content

[0005] The purpose of this invention is to provide an immersion liquid-cooled battery system that can improve the cooling effect of the battery body, enhance safety and reliability, and make maintenance more convenient.

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

[0007] The immersion liquid-cooled battery system includes a cooling cabinet, a module frame, and multiple battery cell bodies. The cooling cabinet has a cooling cavity filled with coolant, and the cooling cabinet has an installation opening that communicates with the cooling cavity. The outer wall of the module frame is slidably connected to the inner wall of the cooling cavity. The module frame can be placed in the cooling cavity from the installation opening along a third direction. The module frame has multiple installation cavities, and each installation cavity has an opening at any end along a second direction. At least one battery cell body is correspondingly installed in each installation cavity, and the battery cell terminal of the battery cell body is located at the opening at any end of the battery cell body along the second direction.

[0008] Optionally, the inner cavity of the module frame is provided with a plurality of partitions extending along a first direction and a third direction, and the plurality of partitions divide the inner cavity of the module frame into a plurality of mounting cavities.

[0009] Optionally, each of the aforementioned mounting cavities is provided with N fixing plates spaced apart along a third direction to divide the mounting cavity into N+1 fixing cavities, and each of the aforementioned fixing cavities is respectively installed with one of the aforementioned battery cell bodies.

[0010] Optionally, the dimensions of the partition plate along the second direction and the dimensions of the fixing plate along the second direction are both no greater than the dimensions of the battery cell body along the second direction, so that a cooling gap for coolant filling is formed between any two adjacent battery cell bodies.

[0011] Optionally, both the partition and the fixing plate are made of ceramic insulation board, rock wool board or glass wool board.

[0012] Optionally, multiple battery cell bodies are electrically connected to form a battery cell group. Multiple module frames are provided in a one-to-one correspondence with the battery cell groups. The multiple module frames are spaced apart along the second direction. The immersion liquid-cooled battery system also includes a combiner cabinet, which is electrically connected to the multiple battery cell groups.

[0013] Optionally, the above-mentioned combiner cabinet, multiple module frames and multiple battery cell groups constitute a battery module, the above-mentioned cooling cabinet is provided with multiple cooling cavities, and the battery modules are provided with multiple cooling cavities in a one-to-one correspondence.

[0014] Optionally, the top of the cooling cabinet is provided with a cover that seals the cooling cavity, the cover is provided with a coolant inlet, and the bottom of the outer circumferential wall of the cooling cabinet is provided with a coolant outlet.

[0015] Optionally, the module frame is provided with a drawer plate at one end along the second direction and an opening at the other end. The circumferential outer wall of the battery cell body is bonded and fixed to the inner wall of the mounting cavity, and the bottom wall of the battery cell body, which is opposite to the battery cell terminal along the second direction, is bonded and fixed to the drawer plate.

[0016] Another objective of this invention is to provide an electrical device that includes an immersion liquid-cooled battery system as described in any of the above embodiments.

[0017] Beneficial effects:

[0018] This utility model discloses an immersion liquid-cooled battery system comprising a cooling cabinet, a module frame, and multiple battery cells. The module frame slides downwards from a third-direction mounting opening into the cooling cavity of the cooling cabinet, forming a drawer-like structure. This allows the module frame and the battery cells inside to be immersed in coolant, improving cooling efficiency. Multiple partitions extend intersecting along the first and third directions within the module frame, dividing its internal space into multiple mounting cavities. The battery cells are installed within these cavities, with their large faces stacked vertically. The battery terminals are located at either end along the second direction, at the opening of the mounting cavity, facilitating connection of multiple battery cells. If any battery cell malfunctions, the module frame can be removed from the cooling cavity, and the corresponding battery cell removed from the mounting cavity. This simplifies maintenance and replacement, improving efficiency and reducing costs. This immersion liquid-cooled battery system enhances cell cooling, improves safety and reliability, and simplifies maintenance. Attached Figure Description

[0019] Figure 1 This is an exploded view of the immersion liquid-cooled battery system provided in a specific embodiment of this utility model;

[0020] Figure 2 This is an isometric view of a portion of the battery module structure provided in a specific embodiment of this utility model;

[0021] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0022] In the picture:

[0023] 100. Cooling cabinet body; 101. Coolant inlet; 102. Coolant outlet; 110. Cooling chamber; 111. Mounting opening; 120. Cover; 121. Battery management module; 122. Combiner cabinet;

[0024] 20. Battery module; 200. Module frame; 201. Mounting cavity; 202. Fixing cavity; 203. Cooling gap; 210. Partition plate; 220. Fixing plate; 230. Drawer plate;

[0025] 30. Cell assembly; 300. Cell body; 301. Cell surface; 302. Cell terminal; 303. Cell bottom wall; 310. Aluminum busbar; 320. Busbar. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] The first direction described in this embodiment is: Figure 1The X direction shown is the horizontal direction and the length direction of the cooling cabinet 100; the second direction is... Figure 1 The Y direction shown is another horizontal direction perpendicular to the X direction and the width direction of the cooling cabinet 100; the third direction is... Figure 1 The Z direction shown is the vertical direction and the height direction of the cooling cabinet 100; the first direction, the second direction, and the third direction are all perpendicular to each other.

[0031] Please refer to Figure 1 and Figure 2 The immersion liquid-cooled battery system includes a cooling cabinet 100, a module frame 200, and multiple battery cell bodies 300. The cooling cabinet 100 has a cooling cavity 110 filled with coolant, and the cooling cabinet 100 has an installation opening 111 communicating with the cooling cavity 110. The outer wall of the module frame 200 is slidably connected to the inner wall of the cooling cavity 110, and the module frame 200 can be placed in the cooling cavity 110 from the installation opening 111 in a third direction. Specifically, the inner wall of the module frame 200... The module frame 200 is provided with a plurality of partitions 210 extending along a first direction and a third direction, thereby dividing the inner cavity of the module frame 200 into a plurality of mounting cavities 201 by the plurality of partitions 210. The mounting cavities 201 are open at any end along a second direction. The first direction, the second direction and the third direction are perpendicular to each other. At least one battery cell body 300 is correspondingly mounted in the mounting cavity 201, and the battery cell terminal 302 of the battery cell body 300 is located at any end of the battery cell body 300 along the second direction.

[0032] The immersion liquid-cooled battery system in this embodiment comprises a cooling cabinet 100, a module frame 200, and multiple battery cell bodies 300. The module frame 200 slides downwards from a third direction through an installation opening 111 into the cooling cavity 110 of the cooling cabinet 100, thus forming a drawer-like structure. This allows the module frame 200 and the battery cell bodies 300 inside the module frame 200 to be immersed in the coolant, improving the cooling effect. Multiple partitions 210 are provided inside the module frame 200, extending intersecting along a first direction and a third direction, thereby dividing the internal space of the module frame 200 into multiple installation cavities 201. The cell body 300 is installed in the mounting cavity 201. During installation, the large cell surfaces 301 of the cell bodies 300 are stacked vertically. The cell terminals 302 of the cell bodies 300 are located at either end along the second direction and at the opening of the mounting cavity 201, facilitating the connection of multiple cell bodies 300. If any cell body 300 fails, the module frame 200 can be removed from the cooling cavity 110, and the corresponding cell body 300 can be disassembled from the mounting cavity 201. Maintenance and replacement are simple, improving maintenance efficiency and reducing maintenance costs. This immersion liquid-cooled battery system improves the cooling effect of the cell bodies 300, enhances safety and reliability, and makes maintenance more convenient.

[0033] Furthermore, multiple cell bodies 300 are electrically connected to form a cell group 30. Multiple module frames 200 are correspondingly arranged to each cell group 30, and these module frames 200 are spaced apart along the second direction. The immersion liquid-cooled battery system also includes a combiner cabinet 122, which is electrically connected to the multiple cell groups 30. The positive and negative terminals of multiple cell bodies 300 inside each module frame 200 are connected via a busbar 320, thereby forming a drawer-type battery cluster with one module frame 200. The output terminals of multiple cell bodies 300 are all connected to the combiner cabinet 122, realizing the return circuit of this layer of cell bodies 300. Specifically, the combiner cabinet 122 is located in an independent sealed area on the outer periphery of the module frame 200, which will not be elaborated further here.

[0034] Furthermore, the two large cell surfaces 301 of the aforementioned cell body 300 are arranged opposite each other along the aforementioned third direction. When the cell body 300 is installed, its large cell surfaces 301 are stacked on top of each other in the vertical direction. The cell terminal 302 of the cell body 300 is located at either end along the second direction and at the opening of the mounting cavity 201, thereby facilitating the connection of multiple cell bodies 300.

[0035] In this embodiment, the aforementioned combiner cabinet 122, multiple module frames 200, and multiple cell groups 30 constitute a battery module 20. The aforementioned cooling cabinet 100 is provided with multiple cooling cavities 110, and multiple battery modules 20 are provided in a one-to-one correspondence with the cooling cavities 110. That is, multiple cooling cavities 110 are provided in the same cooling cabinet 100, thereby simultaneously installing multiple battery modules 20, increasing the capacity of the immersion liquid-cooled battery system. Furthermore, other numbers of battery modules 20, such as 2, 3, 4, or 5, can be provided as needed, which will not be listed here.

[0036] like Figure 1 As shown, the top of the cooling cabinet 100 is further provided with a cover 120 that seals the cooling inner cavity 110. The cover 120 is provided with a coolant inlet 101, and the bottom of the outer circumferential wall of the cooling cabinet 100 is provided with a coolant outlet 102. The coolant is injected from the top of the cooling cabinet 100 and flows out from the bottom of the cooling cabinet 100, forming a natural circulation by utilizing the height difference to reduce pump power consumption. At the same time, a guide channel is provided at the top of the cooling cabinet 100 to evenly distribute the coolant to each row of battery cells 300, reducing local temperature differences.

[0037] The coolant inlet 101 and coolant outlet 102 are connected to a compact liquid cooling unit, which includes an integrated compressor, condenser, and water pump. It is located outside the cooling cabinet 100 and connected to the cooling cabinet 100 through inlet and outlet water pipes. The liquid cooling unit is also connected to a liquid storage tank, which is typically 1.2-1.5 times the volume of the coolant and has a built-in liquid level sensor and an automatic liquid replenishment device.

[0038] Furthermore, the cover 120 also integrates a battery management module 121, which integrates an MSD port, a communication port, a fuse, positive and negative terminals, and a battery thermal management system for thermal and power management of the submerged liquid-cooled battery system. It also adds a waterproof sealing structure to achieve an IP67 protection rating. The cover 120 is also equipped with a touch screen that displays the temperature, pressure, and other parameters of the internal battery cell body 300 and coolant in real time, and uploads the data to the cloud via a 4G / 5G module to support edge computing to optimize charging and discharging strategies.

[0039] Preferably, the wiring harness connections between the battery cell bodies 300 all use cables and waterproof sleeves to avoid crossing with coolant pipelines; at the same time, voltage / temperature acquisition lines are arranged in each drawer-type battery cluster and transmitted wirelessly to the battery management module 121; furthermore, a metal shielding layer is wrapped around the high-voltage cable to prevent electromagnetic interference from affecting the accuracy of the BMS.

[0040] like Figure 2As shown, the module frame 200 has a drawer plate 230 at one end along the second direction and an opening at the other end. The circumferential outer wall of the battery cell body 300 is bonded and fixed to the inner wall of the mounting cavity 201, and the bottom wall 303 of the battery cell body 300, which is opposite to the battery cell terminal 302 along the second direction, is bonded and fixed to the drawer plate 230. This bonding method not only allows for simple and convenient fixing of the battery cell body 300 to the module frame 200, but also facilitates disassembly, improving disassembly and maintenance efficiency.

[0041] like Figure 2 and Figure 3 As shown, each of the aforementioned mounting cavities 201 is provided with N fixing plates 220 spaced along a third direction to divide the mounting cavity 201 into N+1 fixing cavities 202. Each fixing cavity 202 contains one of the aforementioned battery cell bodies 300. Specifically, N is a positive integer. By setting the fixing plates 220, the mounting cavity 201 can be divided into multiple fixing cavities 202, improving the installation stability of each battery cell body 300 in the mounting cavity 201, increasing the number of battery cell bodies 300, reducing the use of separators 210, and improving the energy density of the immersion liquid-cooled battery system.

[0042] Optionally, the dimensions of the partition 210 and the fixing plate 220 along the second direction are both no greater than the dimension of the cell body 300 along the second direction, so that a cooling gap 203 for coolant filling is formed between any two adjacent cell bodies 300. The arrangement of the fixing plate 220 and the partition 210, whose dimensions are smaller than the cell body 300, allows for the formation of a cooling gap 203 for coolant flow and filling between adjacent cell bodies 300. This cooling gap 203 has a size of 2mm, ensuring that the cell body 300 is fully immersed in the coolant, thus improving the cooling effect.

[0043] Optionally, two adjacent battery cell bodies 300 along the aforementioned third direction are connected in series by welding aluminum busbars 310. The battery cell bodies 300 are connected in series by welding aluminum busbars 310, and every two rows of battery cell bodies 300 form a battery stack. Each battery stack is connected to a busbar 320 with a copper busbar (divided into one positive copper busbar output terminal and one negative copper busbar output terminal), which forms a closed loop after assembly. The copper busbar output terminal is connected to a wire harness terminal and a fixed conductive block, which is locked with bolts, and is also connected to the positive and negative output terminals in the combiner cabinet 122 to form a closed loop.

[0044] In this embodiment, both the separator 210 and the fixing plate 220 are made of ceramic heat insulation board, rock wool board, or glass wool board. The support frame is an aluminum alloy profile skeleton with a thickness of 5mm and a surface covered with an insulating ceramic coating. It has a withstand voltage greater than 1000V to prevent short circuits. The fixing plate 220 and separator 210 are specifically made of ceramic heat insulation board, which can simultaneously achieve insulation, heat insulation, and buffering functions, while being lightweight to ensure that the energy density of the immersed liquid-cooled battery system is not affected.

[0045] This embodiment also provides an electrical device that includes an immersion liquid-cooled battery system as described in any of the above embodiments. This electrical device employs the aforementioned immersion liquid-cooled battery system, thus possessing all the beneficial effects of the immersion liquid-cooled battery system described in any of the above embodiments, which will not be elaborated further here. Specifically, this electrical device is an energy storage container, capable of immersing the module frame 200 and the internal cell body 300 in coolant, improving cooling efficiency; and in the event of a failure in any cell body 300, it is only necessary to remove the module frame 200 from the cooling cavity 110 and disassemble the corresponding cell body 300 from the mounting cavity 201, simplifying maintenance and replacement operations, improving maintenance efficiency, and reducing maintenance costs.

[0046] 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 liquid-cooled battery system, characterized in that, include: A cooling cabinet (100) has a cooling cavity (110) filled with coolant, and the cooling cabinet (100) has an installation opening (111) that communicates with the cooling cavity (110). A module frame (200) has its outer wall slidably connected to the inner wall of the cooling cavity (110). The module frame (200) can be placed in the cooling cavity (110) from the mounting opening (111) in a third direction. The module frame (200) is provided with a plurality of mounting cavities (201), and the mounting cavities (201) are opened at either end in a second direction. Multiple battery cell bodies (300) are provided, and at least one of the battery cell bodies (300) is installed in the mounting cavity (201) in a corresponding manner. The battery cell terminal (302) of the battery cell body (300) is located at any end opening of the battery cell body (300) along the second direction.

2. The immersion liquid-cooled battery system according to claim 1, characterized in that, The inner cavity of the module frame (200) is provided with a plurality of partitions (210) extending along a first direction and a third direction, and the plurality of partitions (210) divide the inner cavity of the module frame (200) into a plurality of mounting cavities (201).

3. The immersion liquid-cooled battery system according to claim 2, characterized in that, Each of the mounting cavities (201) is provided with N fixing plates (220) spaced apart along the third direction to divide the mounting cavity (201) into N+1 fixing cavities (202), and each fixing cavity (202) is provided with a corresponding battery cell body (300).

4. The immersion liquid-cooled battery system according to claim 3, characterized in that, The dimensions of the partition (210) along the second direction and the dimensions of the fixing plate (220) along the second direction are both no greater than the dimensions of the cell body (300) along the second direction, so that a cooling gap (203) for coolant filling is formed between any two adjacent cell bodies (300).

5. The immersion liquid-cooled battery system according to claim 3, characterized in that, Both the partition (210) and the fixing plate (220) are made of any one of ceramic insulation board, rock wool board or glass wool board.

6. The immersion liquid-cooled battery system according to claim 1, characterized in that, Multiple battery cell bodies (300) are electrically connected to form a battery cell group (30). Multiple module frames (200) are provided in a one-to-one correspondence with the battery cell group (30). Multiple module frames (200) are spaced apart along the second direction. The immersion liquid-cooled battery system also includes a combiner cabinet (122), which is electrically connected to multiple battery cell groups (30).

7. The immersion liquid-cooled battery system according to claim 6, characterized in that, The combiner cabinet (122), multiple module frames (200) and multiple battery cell groups (30) constitute a battery module (20). The cooling cabinet (100) is provided with multiple cooling cavities (110). The battery module (20) and the cooling cavities (110) are provided in a one-to-one correspondence.

8. The immersion liquid-cooled battery system according to claim 7, characterized in that, The top of the cooling cabinet (100) is provided with a cover (120) that seals the cooling inner cavity (110), the cover (120) is provided with a coolant inlet (101), and the bottom of the outer wall of the cooling cabinet (100) is provided with a coolant outlet (102).

9. The immersion liquid-cooled battery system according to any one of claims 1-8, characterized in that, The module frame (200) is provided with a drawer plate (230) at one end along the second direction and an opening at the other end. The circumferential outer wall of the cell body (300) is bonded and fixed to the inner wall of the mounting cavity (201). The bottom wall (303) of the cell body (300) opposite to the cell electrode (302) along the second direction is bonded and fixed to the drawer plate (230).

10. Electrical equipment, characterized in that, Including the immersion liquid-cooled battery system as described in any one of claims 1-9.

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