An immersion type battery liquid cooling box

Abstract

The utility model relates to battery thermal management technical field especially, more particularly to a kind of immersion type battery liquid cooling box, including box and the box cover being installed in the top of box, the top frame and the bottom bracket are installed in the box, battery pack is installed between the top frame and the bottom bracket, fluorinated liquid that battery pack is completely immersed is also equipped in the box, heat exchange component that the fluorinated liquid is converted from gaseous state to liquid state is fixed on the box cover;The heat exchange component includes the heat conduction plate embedded in the box cover, the bottom of heat conduction plate integrally formed with multiple side-by-side arranged heat conduction fins, the both sides of the bottom of heat conduction fin are equipped with liquid receiving groove installed in the box;The immersion type battery liquid cooling box compared with prior art, without complex pipeline, pump and other liquid cooling circulating components, also do not need additional insulation isolation device, simplify system structure, reduce fault point, it is convenient to maintain and management, can also save space, be favorable to the compact design of battery system.

Description

Technical Field

[0001] This utility model relates to the field of battery thermal management technology, specifically to an immersion battery liquid cooling box. Background Technology

[0002] Currently, battery liquid cooling technology is widely used due to its superior heat dissipation efficiency compared to traditional air cooling. Among them, immersion liquid cooling has an even greater advantage in heat transfer efficiency due to the direct contact between the coolant and the battery. However, existing immersion liquid cooling systems often require complex piping, pumps, valves, and other components to achieve coolant circulation and heat dissipation, forming a closed-loop circulation circuit. This structure not only increases the size and weight of the system, reducing the utilization rate of battery compartment space and hindering compact design, but more importantly, the coordinated operation of multiple components increases the number of potential failure points: problems such as pipe leaks, pump failures, and valve jamming can all lead to the failure of the cooling system, thereby affecting battery safety. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an immersion battery liquid cooling box, which solves the technical problems of complex system structure, multiple failure points, high maintenance costs, and low space utilization.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an immersion battery liquid cooling box, including a box body and a box cover installed on the top of the box body, a top frame and a bottom frame installed inside the box body, a battery pack installed between the top frame and the bottom frame, a fluorinated liquid completely immersing the battery pack inside the box body, and a heat exchange component that converts the fluorinated liquid from a gaseous state to a liquid state fixed on the box cover.

[0005] The heat exchange assembly includes a heat-conducting plate embedded in the cover. The bottom of the heat-conducting plate is integrally formed with multiple heat-conducting sheets arranged side by side. Both sides of the bottom of the heat-conducting sheets are provided with liquid receiving grooves installed inside the box. The bottom of the liquid receiving grooves near both ends are connected to return pipes. At least two semiconductor cooling chips are embedded in the top of the heat-conducting plate. Heat sinks are installed on the surface of the semiconductor cooling chips. The cold end face of the semiconductor cooling chip is embedded in the heat-conducting plate, and the hot end face is in contact with the heat sink. A cooling fan is installed on the side wall of the heat sink.

[0006] Preferably, the bottom of the heat-conducting sheet has an inverted "V" shape, and the bottom of the heat-conducting sheet has an edge protrusion to guide the fluorinated liquid to the receiving tank.

[0007] Preferably, the cold end face of the semiconductor cooling chip is embedded in the heat-conducting plate, and the hot end face is attached to the heat sink.

[0008] Preferably, a fixing post is fixed at each of the four corners of the heat-conducting plate surface, and a protective plate is installed on the fixing post above the heat sink. A nut is threaded to the top of the fixing post.

[0009] Preferably, the base frame consists of two sets of steel frames and multiple rows of lower positioning frames, the top frame consists of two sets of fixed frames and multiple rows of upper positioning frames, and the battery packs are installed at intervals between the upper and lower positioning frames.

[0010] Preferably, a sealing ring is provided at the connection between the box body and the box cover.

[0011] Preferably, a pressure sensor is installed inside the box, and a digital display screen electrically connected to the pressure sensor is installed on the outer wall of the box.

[0012] By employing the above technical solution, this utility model provides an immersion battery liquid cooling box, which has at least the following beneficial effects:

[0013] 1. This immersion-type liquid-cooled battery box places the battery pack inside the box, which contains liquid fluoride. A heat-conducting plate is located on the top inner side of the box, which is in contact with the gaseous fluoride. The heat-conducting plate is cooled by a semiconductor cooling chip, which is equipped with a heat sink and a cooling fan. The box contains only the battery, fluoride, and heat-conducting plate, while the heat sink and cooling fan are located on the outside of the box. The inside and outside of the box are completely isolated. Compared with existing technologies, this structure eliminates the need for complex pipes, pumps, and other liquid-cooling circulation components, as well as additional insulation and isolation devices. This simplifies the system structure, reduces failure points, facilitates maintenance and management, saves space, and is conducive to the compact design of the battery system.

[0014] 2. This immersion battery liquid cooling box, by setting a base frame and a top frame, allows the battery packs to be installed in the box in a spaced manner. This allows the fluorinated liquid to better contact all the battery packs, achieving a better heat dissipation effect.

[0015] 3. This immersion battery liquid cooling box has a built-in pressure sensor. If there is no change in the internal pressure of the box during use, it indicates a leak and requires timely repair to prevent excessive leakage of fluoride. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0017] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the box body of this utility model;

[0019] Figure 3 This is a schematic diagram showing the disassembled structure of the base frame, battery pack, and top frame of this utility model;

[0020] Figure 4 This is a schematic diagram of the base frame of this utility model;

[0021] Figure 5 This is a schematic diagram of the top frame of this utility model;

[0022] Figure 6 This is a schematic diagram of the heat exchange component of this utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the box body of this utility model.

[0024] Figure label:

[0025] 1. Housing; 2. Cover; 3. Sealing ring; 4. Base frame; 41. Steel frame; 42. Lower positioning frame; 5. Battery pack; 6. Top frame; 61. Fixing frame; 62. Upper positioning frame; 7. Heat exchange assembly; 71. Heat-conducting plate; 72. Heat-conducting sheet; 72. Edge protrusion; 73. Liquid receiving tank; 74. Liquid return pipe; 75. Semiconductor cooling chip; 76. Heat sink; 77. Cooling fan; 78. Fixing column; 79. Protective plate; 710. Nut; 8. Pressure sensor; 9. Digital display screen. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Against the backdrop of rapid development in new energy technologies, batteries, as the core component for energy storage and output, directly affect performance, lifespan, and safety due to the stability of their operating temperature. Especially in high-power charging and discharging scenarios, batteries continuously generate a large amount of heat. If heat dissipation is not timely or uneven, it can easily lead to localized overheating and trigger the risk of thermal runaway. Therefore, efficient battery heat dissipation solutions have become a key focus of industry research.

[0028] Due to the inherent technical limitations of existing technologies, such as complex system structure, numerous failure points, high maintenance costs, and low space utilization, please refer to... Figures 1-7This embodiment provides an immersion battery liquid cooling box, which, compared with the prior art, eliminates the need for complex pipes, pumps, and other liquid cooling circulation components, as well as additional insulation isolation devices. This simplifies the system structure, reduces failure points, facilitates maintenance and management, and saves space, thus promoting a more compact battery system design. The liquid cooling box includes a box body 1 and a box cover 2 installed on top of the box body 1. A top frame 6 and a bottom frame 4 are installed inside the box body 1, and a battery pack 5 is installed between the top frame 6 and the bottom frame 4. The box body 1 also contains a fluorinated liquid that completely immerses the battery pack 5. A heat exchange component 7 that converts the fluorinated liquid from a gaseous state to a liquid state is fixed on the box cover 2. By integrating the heat exchange component 7 into the box cover 2, external circulation components are eliminated, simplifying the system structure. The fluorinated liquid directly immerses the battery, utilizing its own insulation properties to eliminate the need for additional insulation devices. The integrated design of the heat exchange component 7 and the box body 1 improves space utilization and reduces failure points.

[0029] Specifically, the heat exchange assembly 7 includes a heat-conducting plate 71 embedded in the cover 2. The bottom of the heat-conducting plate 71 has multiple heat-conducting fins 72 integrally formed and arranged side-by-side. Liquid receiving grooves 73 installed inside the housing 1 are provided on both sides of the bottom of the heat-conducting fins 72. Return pipes 74 are connected to the bottom of the liquid receiving grooves 73 near both ends. At least two thermoelectric coolers 75 are embedded in the top of the heat-conducting plate 71, and heat sinks 76 are mounted on the surface of the thermoelectric coolers 75. The cold end face of the thermoelectric cooler 75 is embedded in the heat-conducting plate 71, and the hot end face is in contact with the heat sink 76. A cooling fan 77 is mounted on the side wall of the heat sink 76. The multiple side-by-side heat-conducting fins 72 increase the... The contact area of ​​the gaseous fluorinated liquid improves condensation efficiency; the return pipe 74 guides the liquid fluorinated liquid back to avoid liquid accumulation; the cold and hot ends of the semiconductor cooling chip 75 are in close contact with the heat-conducting plate 71 and the heat sink 76, respectively, reducing thermal resistance and enhancing heat exchange effect; during use, the heat from the battery pack 5 causes the fluorinated liquid to heat up and vaporize. After the gaseous fluorinated liquid moves upward and comes into contact with the heat-conducting plate 72, the temperature of the heat-conducting plate 71 and the heat-conducting plate 72 is reduced due to the cold end of the semiconductor cooling chip 75 being in contact with the heat-conducting plate 71, thereby causing the gaseous fluorinated liquid to re-liquefy, so as to realize the heat dissipation. The dissipated heat is blown away by the heat sink 76 and the cooling fan 77.

[0030] It should be further noted that the fluorinated liquid used is the same material as the fluorinated liquid disclosed in patent number CN111864305B.

[0031] Traditional heat-conducting plates 72 are mostly flat at the bottom, resulting in disordered flow of liquid fluorinated liquid and difficulty in efficient collection. To address this issue, the bottom of the heat-conducting plate 72 has an inverted "V" shape, and the bottom of the heat-conducting plate 72 is provided with an edge protrusion 721 to guide the flow of fluorinated liquid to the liquid receiving tank 73. The inverted "V" shape bottom, together with the edge protrusion 721, uses gravity to guide the liquid fluorinated liquid to flow quickly to the liquid receiving tank 73, avoiding residue. The orderly flow guidance improves the circulation efficiency of the fluorinated liquid and enhances the stability of heat dissipation.

[0032] Components such as heat sink 76 and thermoelectric cooler 75 are exposed and susceptible to external impacts and dust accumulation, which can lead to reduced heat dissipation efficiency or component damage. To address this issue, fixing posts 78 are fixed at the four corners of the heat conduction plate 71. A protective plate 79 is mounted on the fixing post 78 above the heat sink 76, and a nut 710 is threaded to the top of the fixing post 78. The protective plate 79 shields the heat sink 76 and thermoelectric cooler 75, reducing external impacts and dust interference. The threaded connection between the fixing post 78 and the nut 710 facilitates the installation and removal of the protective plate 79, reducing maintenance difficulty.

[0033] The dense arrangement of traditional batteries obstructs the flow of fluoride and causes uneven heat dissipation. To address this issue, the base frame 4 consists of two sets of steel frames 41 and multiple rows of lower positioning frames 42, while the top frame 6 consists of two sets of fixing frames 61 and multiple rows of upper positioning frames 62. The battery packs 5 are installed at intervals between the upper positioning frames 62 and the lower positioning frames 42. The upper positioning frames 62 and the lower positioning frames 42 fix the battery packs 5 at intervals, leaving gaps for the flow of fluoride and improving the uniformity of heat dissipation.

[0034] If the connection between the enclosure 1 and the cover 2 is not properly sealed, it can easily lead to leakage of fluorinated liquid or the entry of external moisture, affecting insulation and heat dissipation efficiency. To address this issue, a sealing ring 3 is provided at the connection between the enclosure 1 and the cover 2. The sealing ring 3 enhances the sealing performance of the enclosure 1, prevents leakage of fluorinated liquid and intrusion of moisture, and ensures the electrical safety of the system and the stability of the fluorinated liquid performance.

[0035] Traditional enclosure 1 lacks internal pressure monitoring, so leaks cannot be detected in time, leading to excessive fluorinated liquid leakage. To address this issue, an internal pressure sensor 8 is installed inside enclosure 1, and a digital display screen 9 electrically connected to the pressure sensor 8 is installed on the outer wall of enclosure 1. When the internal pressure of enclosure 1 remains unchanged during use, it indicates a leak, requiring timely repair to prevent excessive fluorinated liquid leakage.

[0036] It should be noted that 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.

[0037] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An immersion battery liquid cooling box, comprising a box body (1) and a box cover (2) mounted on the top of the box body (1), characterized in that: The box (1) is equipped with a top frame (6) and a bottom frame (4), and a battery pack (5) is installed between the top frame (6) and the bottom frame (4). The box (1) is also equipped with a fluorinated liquid that completely submerges the battery pack (5). A heat exchange component (7) that converts the fluorinated liquid from a gaseous state to a liquid state is fixed on the box cover (2). The heat exchange assembly (7) includes a heat-conducting plate (71) embedded in the cover (2). The bottom of the heat-conducting plate (71) is integrally formed with multiple heat-conducting sheets (72) arranged side by side. Both sides of the bottom of the heat-conducting sheet (72) are provided with liquid receiving grooves (73) installed in the box body (1). The bottom of the liquid receiving grooves (73) near both ends are connected to return pipes (74). At least two semiconductor cooling chips (75) are embedded in the top of the heat-conducting plate (71), and heat sinks (76) are installed on the surface of the semiconductor cooling chips (75). A cooling fan (77) is installed on the side wall of the heat sink (76).

2. The immersion battery liquid cooling box according to claim 1, characterized in that: The bottom of the heat-conducting plate (72) has an inverted "V" shaped structure, and the bottom of the heat-conducting plate (72) is provided with an edge protrusion (721) to guide the fluorinated liquid to flow to the liquid receiving tank (73).

3. The immersion battery liquid cooling box according to claim 1, characterized in that: The cold end face of the semiconductor cooling chip (75) is embedded in the heat-conducting plate (71), and the hot end face is attached to the heat sink (76).

4. The immersion battery liquid cooling box according to claim 1, characterized in that: Fixed posts (78) are fixed at the four corners of the surface of the heat-conducting plate (71). A protective plate (79) is installed on the fixed post (78) above the heat sink (76). A nut (710) is threaded to the top of the fixed post (78).

5. The immersion battery liquid cooling box according to claim 1, characterized in that: The base frame (4) consists of two sets of steel frames (41) and multiple rows of lower positioning frames (42), the top frame (6) consists of two sets of fixed frames (61) and multiple rows of upper positioning frames (62), and the battery pack (5) is installed at intervals between the upper positioning frame (62) and the lower positioning frame (42).

6. The immersion battery liquid cooling box according to claim 1, characterized in that: A sealing ring (3) is provided at the connection between the box body (1) and the box cover (2).

7. The immersion battery liquid cooling box according to claim 1, characterized in that: A pressure sensor (8) is installed inside the housing (1), and a digital display screen (9) electrically connected to the pressure sensor (8) is installed on the outer wall of the housing (1).

Images