Integrated packaging structure of submerged liquid-cooled lithium cell array

Abstract

The application relates to the technical field of lithium batteries, in particular to an integrated packaging structure of an immersed liquid-cooled lithium cell array, which comprises a box body, a top plate, a locking assembly and a sealing assembly. The box body is internally provided with cells and is provided with an inlet pipe and an outlet pipe in communication with external circulating pipelines to form an immersed liquid-cooled loop. The top plate is detachably fixed at the top opening of the box body through the locking assembly. The sealing assembly is arranged between the top plate and the box body and is used for realizing the sealing between the top plate and the box body. Through the arrangement of the locking assembly and the sealing assembly, the detachable and stable connection of the top plate and the box body can be realized through the cooperation of the positioning plate, the fixed plate, the limiting plug and the locking bolt in the locking assembly, the problems of difficult maintenance and easy damage of the welded packaging are solved, the cooperation of the positioning frame, the sealing ring and the sealing groove in the sealing assembly can form reliable sealing, liquid-cooled medium leakage is avoided, and meanwhile, the liquid-cooled loop is cooperated to guarantee stable heat dissipation of the cells. The whole considers the maintenance convenience, the structural sealing property and the use safety.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, specifically to an integrated packaging structure for an immersion liquid-cooled lithium battery cell array. Background Technology

[0002] With the large-scale application of lithium-ion batteries in the new energy field, the large amount of heat generated during their operation has become a key factor affecting performance and safety. Immersion liquid cooling technology has gradually become the mainstream heat dissipation solution for high-power lithium battery cell arrays due to its advantages of high heat dissipation efficiency and good temperature uniformity. The packaging structure of the cell array directly determines the heat dissipation reliability and later maintenance convenience of the liquid cooling system.

[0003] Currently, the encapsulation of immersion liquid-cooled lithium battery cell arrays mostly adopts welding technology to fix the box and top plate. Although this method can achieve a certain sealing effect in the initial stage, welding is a non-removable connection. When the battery cell fails and needs to be repaired or replaced, the overall encapsulation structure must be destroyed. This is not only complicated and time-consuming, but also prone to secondary damage to the box and top plate, which greatly increases maintenance costs and the risk of scrapping the battery cell array. Therefore, this utility model proposes an integrated encapsulation structure for immersion liquid-cooled lithium battery cell arrays to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated packaging structure for an immersion liquid-cooled lithium battery cell array, which combines ease of maintenance, structural sealing, and assembly flexibility through detachable connection and reliable sealing design, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated packaging structure for an immersion liquid-cooled lithium battery cell array, comprising a housing, a top plate, a locking assembly, and a sealing assembly; The housing contains battery cells and is equipped with an inlet pipe and an outlet pipe that are connected to an external circulation pipeline to form an immersion liquid cooling circuit. The top plate is detachably fixed to the top opening of the housing by the locking assembly; The sealing assembly is disposed between the top plate and the housing to achieve a seal between the top plate and the housing.

[0006] Preferably, the locking assembly includes a positioning plate fixedly installed on the top plate and a fixing plate fixed on the housing, wherein the fixing plate has a positioning groove into which the positioning plate extends.

[0007] Preferably, the fixing plate has a sliding groove inside, and a limiting block is slidably connected in the sliding groove. One end of the limiting block is fixedly connected to a sliding rod.

[0008] Preferably, the end of the sliding rod away from the limiting block slides out of the fixed plate and is fixedly connected to the moving plate. The moving plate is provided with a locking bolt, which is used to lock the moving plate and the fixed plate.

[0009] Preferably, a return spring is provided in the sliding groove, the return spring is sleeved on the sliding rod, one end of the return spring abuts against the limiting plug, and the other end abuts against the inner wall of the sliding groove, and a locking groove is provided on the positioning plate for the limiting plug to extend into.

[0010] Preferably, the limiting block has an inclined surface.

[0011] Preferably, the sealing assembly includes a positioning frame fixed to the top plate and a sealing groove formed on the housing, the sealing groove into which the positioning frame extends, and a sealing ring disposed within the sealing groove.

[0012] Compared with the prior art, the beneficial effects of the present invention are: By incorporating locking and sealing components, the locking component, consisting of a positioning plate, a fixing plate, a limit block, and locking bolts, enables a detachable and secure connection between the top plate and the housing, solving the problems of difficult maintenance and easy damage associated with welding and encapsulation. The sealing component, consisting of a positioning frame, a sealing ring, and a sealing groove, forms a reliable seal, preventing leakage of the liquid cooling medium. Simultaneously, it works with the liquid cooling circuit to ensure stable heat dissipation of the battery cells, thus balancing maintenance convenience, structural sealing, and operational safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the positioning frame structure of the present invention.

[0015] Figure 3 This is a schematic diagram of the fixing plate structure of the present invention.

[0016] Figure 4 This is a schematic diagram of the limiting insert structure of the present invention.

[0017] Figure 5 This is a schematic diagram of the sliding groove structure of the present invention.

[0018] In the diagram: 1. Housing; 2. Top plate; 3. Locking assembly; 4. Battery cell; 5. Inlet pipe; 6. Outlet pipe; 7. Sealing assembly; 31. Fixing plate; 32. Positioning groove; 33. Positioning plate; 34. Locking groove; 35. Moving plate; 36. Locking bolt; 37. Limiting block; 38. Sliding rod; 39. Return spring; 310. Sliding groove; 71. Positioning frame; 72. Sealing ring; 73. Sealing groove. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 invention according to the specific circumstances.

[0021] Please see Figures 1 to 5 This invention provides a technical solution: an integrated packaging structure for an immersion liquid-cooled lithium battery cell array, including a housing 1, a top plate 2, a locking assembly 3, and a sealing assembly 7. The housing 1 is a hollow structure with an open top, which is used to accommodate multiple sets of battery cells 4. The battery cells 4 are arranged in an array and connected by wires to form a battery pack. An inlet pipe 5 and an outlet pipe 6 are fixedly connected to the side wall of the housing 1. The inlet pipe 5 and the outlet pipe 6 are respectively connected to the two ends of an external liquid-cooling circulation pipeline, so that the low-temperature liquid cooling medium can enter the housing 1 through the inlet pipe 5 to immerse the battery cells 4, absorb heat, and then flow back to the external circulation system in the prior art through the outlet pipe 6, forming a complete immersion liquid-cooling circuit.

[0022] like Figure 2 As shown, the top plate 2 is a plate-shaped structure adapted to the top opening of the box 1, and is detachably fitted to the top opening of the box 1 by the locking assembly 3.

[0023] like Figures 2 to 5 As shown, the locking assembly 3 includes a fixed plate 31, a positioning plate 33, a limiting block 37, a sliding rod 38, a moving plate 35, a locking bolt 36, and a return spring 39. The fixed plate 31 is vertically fixed to the outer wall of the housing 1. Each fixed plate 31 has a positioning groove 32 on its top. The positioning plate 33 corresponds to the fixed plate 31 and is vertically fixed to the bottom edge of the top plate 2. Its size is adapted to the positioning groove 32 and can extend into the positioning groove 32 as the top plate 2 closes to achieve initial positioning.

[0024] like Figures 2 to 5As shown, a horizontal sliding groove 310 is provided inside the fixed plate 31. The sliding groove 310 is connected to the positioning groove 32. The limiting plug 37 is slidably connected in the sliding groove 310. The end of the limiting plug 37 near the positioning groove 32 is provided with an inclined surface facing the entrance of the positioning groove 32. The end away from the positioning groove 32 is fixedly connected to one end of the sliding rod 38. The other end of the sliding rod 38 slides through the side wall of the sliding groove 310 away from the positioning groove 32 and extends out of the fixed plate 31. This end is fixed perpendicularly to the moving plate 35. The return spring 39 is sleeved on the part of the sliding rod 38 located in the sliding groove 310. One end of the return spring 39 abuts against the side of the limiting plug 37 away from the positioning groove 32, and the other end abuts against the inner wall of the sliding groove 310. Under normal conditions, the return spring 39 is in a naturally extended state, pushing part of the structure of the limiting plug 37 into the positioning groove 32.

[0025] The side wall of the positioning plate 33 is provided with a locking groove 34 that is adapted to the limiting plug 37. When the positioning plate 33 extends into the positioning groove 32 to the preset position, the locking groove 34 is aligned with the limiting plug 37, so that the limiting plug 37 is locked into the locking groove 34 under the action of the return spring 39. The moving plate 35 is threaded with a locking bolt 36. The end of the locking bolt 36 can be tightened to abut against the outer side wall of the fixed plate 31, thereby locking the moving plate 35 and the fixed plate 31.

[0026] like Figure 1 and Figure 2 As shown, the sealing assembly 7 is disposed between the top plate 2 and the housing 1, including a positioning frame 71, a sealing ring 72, and a sealing groove 73. The positioning frame 71 is a rectangular structure adapted to the bottom edge of the top plate 2 and fixed to the bottom of the top plate 2. The sealing groove 73 is a groove opened at the edge of the top opening of the housing 1, and its size is adapted to the positioning frame 71. The sealing ring 72 is a rectangular structure made of elastic material and is embedded and fixed in the sealing groove 73. When the positioning frame 71 extends into the sealing groove 73, it can squeeze the sealing ring 72 to make it elastically deform, thereby filling the gap between the positioning frame 71 and the sealing groove 73, and realizing the seal between the top plate 2 and the housing 1.

[0027] During actual assembly, first install the battery cell array 4 inside the housing 1 and complete the wiring connection, then align the top plate 2 with the top opening of the housing 1; then, align the positioning frame 71 at the bottom of the top plate 2 with the sealing groove 73 of the housing 1, and at the same time align the positioning plate 33 with the positioning groove 32 of the fixing plate 31, and slowly press down the top plate 2. During the pressing process, the positioning plate 33 gradually extends into the positioning groove 32, and its bottom contacts the inclined surface of the limiting plug 37. Under the guidance of the inclined surface, the limiting plug 37 is pushed to compress the reset spring 39 and retract into the sliding groove 310. When the top plate 2 is pressed down to the preset position, the locking groove 34 on the positioning plate 33 aligns with the limiting block 37. Under the restoring force of the return spring 39, the limiting block 37 pops out and locks into the locking groove 34, achieving the initial locking of the top plate 2 and the housing 1. At this time, the positioning frame 71 is fully inserted into the sealing groove 73, forming a uniform compression on the sealing ring 72 to ensure that the liquid cooling medium will not leak. Finally, tighten the locking bolt 36 on the movable plate 35 to secure the movable plate 35 to the fixed plate 31, further enhancing connection stability and completing the overall encapsulation. When maintenance or replacement of the battery cell 4 is required, loosen the locking bolt 36 in the opposite direction, pull the movable plate 35 to retract the sliding rod 38 and the limit block 37, causing the limit block 37 to disengage from the locking groove 34, and the top plate 2 can be removed upwards. The operation is convenient and will not damage the housing 1 and the top plate 2.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated packaging structure for an immersion liquid-cooled lithium battery cell array, characterized in that: Includes housing (1), top plate (2), locking assembly (3) and sealing assembly (7); The housing (1) is equipped with a battery cell (4) and an inlet pipe (5) and an outlet pipe (6) connected to an external circulation pipeline to form an immersion liquid cooling circuit. The top plate (2) is detachably fixed to the top opening of the box (1) by the locking assembly (3); The sealing component (7) is disposed between the top plate (2) and the housing (1) to achieve a seal between the top plate (2) and the housing (1).

2. The integrated packaging structure of the immersion liquid-cooled lithium battery cell array according to claim 1, characterized in that: The locking assembly (3) includes a positioning plate (33) fixedly installed on the top plate (2) and a fixing plate (31) fixedly installed on the housing (1). The fixing plate (31) has a positioning groove (32) for the positioning plate (33) to extend into.

3. The integrated packaging structure of the immersion liquid-cooled lithium battery cell array according to claim 2, characterized in that: The fixed plate (31) has a sliding groove (310) inside, and a limiting plug (37) is slidably connected in the sliding groove (310). A sliding rod (38) is fixedly connected to one end of the limiting plug (37).

4. The integrated packaging structure of the immersion liquid-cooled lithium battery cell array according to claim 3, characterized in that: The end of the sliding rod (38) away from the limiting plug (37) slides out of the fixed plate (31) and is fixedly connected to the moving plate (35). The moving plate (35) is provided with a locking bolt (36), which is used to lock the moving plate (35) and the fixed plate (31).

5. The integrated packaging structure of the immersion liquid-cooled lithium battery cell array according to claim 4, characterized in that: A reset spring (39) is provided in the sliding groove (310). The reset spring (39) is sleeved on the sliding rod (38). One end of the reset spring (39) abuts against the limiting plug (37), and the other end abuts against the inner wall of the sliding groove (310). A locking groove (34) is provided on the positioning plate (33) for the limiting plug (37) to extend into.

6. The integrated packaging structure of the immersion liquid-cooled lithium battery cell array according to claim 5, characterized in that: The limiting plug (37) has an inclined surface.

7. The integrated packaging structure of the immersion liquid-cooled lithium battery cell array according to claim 1, characterized in that: The sealing assembly (7) includes a positioning frame (71) fixed on the top plate (2) and a sealing groove (73) opened on the box body (1). The positioning frame (71) extends into the sealing groove (73), and a sealing ring (72) is provided in the sealing groove (73).

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