Battery case heat dissipation structure

Abstract

The utility model provides a battery case heat dissipation structure, including the shell, the both ends of shell are installed with thin end head and thick end head respectively, the side surface of shell evenly processes a plurality of water flow passageways that pass through the shell, is installed with the water supply passageway that communicates with water flow passageway in thin end head, is installed with the backwater passageway that communicates with water flow passageway in thick end head, the water inlet cylinder one end is installed with the water inlet plug -in cover of hollow shape, the structure that the water inlet cylinder passes through two thin end head forms, the water inlet cylinder links together with water supply passageway, the water outlet cylinder one end is installed with the water outlet plug -in cover of hollow shape, the structure that the water outlet cylinder passes through two thick end head forms, the water outlet cylinder communicates with backwater passageway, the utility model has the beneficial effect that can take away the heat that the stacked battery pack generates, especially adapts high -power discharge, fast charge and so on heat -generating dense scene, avoids partial temperature to rise suddenly and triggers temperature control protection, guarantees the stable play of battery performance.

Description

Technical Field

[0001] This utility model is a heat dissipation structure for a battery casing, belonging to the field of battery technology. Background Technology

[0002] In the heat dissipation design of stacked battery packs (such as power batteries and energy storage battery packs), air cooling has become one of the common heat dissipation solutions due to its advantages of simple structure and controllable cost. Its core logic is to remove the heat generated during the battery stacking process by airflow: ventilation channels are usually reserved in the gaps between battery packs, and fans (such as axial fans or centrifugal fans) or natural wind are used to guide the air in from one end of the channel. As the air flows over the battery surface, it absorbs heat and then is discharged from the other end, forming a "heat absorption-heat exchange-heat dissipation" cycle. This maintains the overall temperature of the battery pack within a safe range and avoids local overheating that could affect battery performance or cause safety risks.

[0003] In stacked battery packs, the middle layer of batteries is surrounded by batteries on both sides. When the air in the ventilation channel flows through the outer layer of batteries, it absorbs some heat, causing the air temperature in the middle layer to rise. This significantly reduces the heat dissipation efficiency and easily creates a temperature gradient of "cool outer layer and hot middle layer". Long-term use will exacerbate battery inconsistency degradation and shorten the overall lifespan. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a battery casing heat dissipation structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a battery casing heat dissipation structure, comprising: The housing has two shells that are interlocked with each other. Each shell has a thin end head and a thick end head installed at its two ends. The thin end head and the thick end head on one shell are interlocked with the thin end head and the thick end head on the other shell, respectively. Multiple water channels are uniformly machined through the shell on one side. A water supply channel communicating with the water channels is installed in the thin end head, and a water return channel communicating with the water channels is installed in the thick end head. There are two water inlet cylinders. A hollow water inlet plug is installed at one end of each water inlet cylinder. The water inlet cylinder passes through the structure formed by the two thin ends. The water inlet cylinder is connected to the water supply channel. There are two water outlet cylinders. One end of each water outlet cylinder is fitted with a hollow water outlet connector. The water outlet cylinder passes through the structure formed by the two thick ends and is connected to the return water channel.

[0006] Furthermore, the thin end has two first circular openings on one side, the water inlet tube passes through the first circular openings and is connected and fixed to the thin end, and the thick end has two second circular openings on one side, the water outlet tube passes through the second circular openings and is connected and fixed to the thick end.

[0007] Furthermore, a water supply hole communicating with the internal space of the water inlet cylinder is machined inside the first circular opening, and two first connecting parts for connecting the water supply channel and the water supply hole are installed inside the thin end head. The first connecting parts are hollow structures, and multiple small water supply holes are evenly opened on one side of the water supply channel. The multiple small water supply holes are respectively connected to multiple water flow channels.

[0008] Furthermore, the second circular opening is machined with a drain hole that communicates with the internal space of the water outlet cylinder. The thick end head is equipped with two second connecting parts for connecting the return water channel and the drain hole. The second connecting part is a hollow structure. A plurality of small drain holes are evenly opened on one side of the return water channel, and the plurality of small drain holes are respectively connected to the plurality of return water channels.

[0009] Furthermore, the first connecting portion in one of the thin end heads overlaps with the first connecting portion in the other thin end head, and the opposite surfaces of the two overlapping first connecting portions are provided with a first connecting hole.

[0010] Furthermore, the second connecting portion in one of the thick end heads overlaps with the second connecting portion in the other rear end head, and the two overlapping second connecting portions each have a second connecting hole on their opposite surfaces.

[0011] Furthermore, sealing strips are provided between the two housings, between the two thin end heads, between the two thick end heads, between the two mating first connecting parts, and between the two mating second connecting parts.

[0012] Furthermore, the inner diameter of the water inlet cylinder is the same as the outer diameter of the water inlet plug sleeve, the inner diameter of the water outlet cylinder is the same as the outer diameter of the water outlet plug sleeve, and both the water inlet plug sleeve and the water outlet plug sleeve are fitted with sealing rings.

[0013] The beneficial effects of this utility model are: A liquid cooling system consisting of a flow channel, a supply channel, and a return channel replaces the traditional air-cooled heat exchange. The cooling liquid flows through an inlet cylinder, a supply channel, and a small supply hole, and is evenly distributed to multiple flow channels on the casing. As it flows over the battery surface, it quickly absorbs heat, and then collects through the return channel and a small drain hole before being discharged through the outlet cylinder. The thermal conductivity of the liquid is much higher than that of air, efficiently removing the heat generated by the stacked battery pack. This is particularly suitable for high-power discharge, fast charging, and other heat-intensive scenarios, preventing sudden temperature rises that trigger temperature control protection and ensuring stable battery performance. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of a battery casing heat dissipation structure according to the present invention; Figure 2 This is a schematic diagram of the assembly of the thin end head, the thick end head, and the housing in a battery housing heat dissipation structure according to the present invention. Figure 3 This is a schematic diagram of the assembly of the thin end head, the thick end head, and the housing from another perspective in a heat dissipation structure for a battery housing according to this utility model. Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a perspective view of the housing in a battery housing heat dissipation structure according to the present invention; Figure 6 This is a perspective view of the thin end of a battery casing heat dissipation structure according to the present invention. Figure 7 This is a perspective view of the thick end of a battery casing heat dissipation structure according to the present invention. In the picture: 1. Shell; 11. Thin end head; 1101. First circular opening; 1102. Water supply channel; 1103. Water supply hole; 1104. First connecting part; 1105. Water supply hole; 1106. First connecting hole; 12. Thick end head; 1201. Water return channel; 1202. Drain hole; 1203. Second connecting part; 1204. Drain hole; 1205. Second connecting hole; 1206. Second circular opening; 13. Water flow channel; 2. Water inlet cylinder; 21. Water inlet connector sleeve; 3. Water outlet cylinder; 31. Water outlet connector sleeve. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] Please see Figures 1-7This utility model provides a technical solution: a battery casing heat dissipation structure, including a casing 1, of which two casings 1 are interlocked. Thin end heads 11 and thick end heads 12 are respectively installed at both ends of the casing 1. The thin end heads 11 and thick end heads 12 on one casing 1 are respectively interlocked with the thin end heads 11 and thick end heads 12 on the other casing 1. Multiple water flow channels 13 are uniformly machined through the casing 1 on one side. A water supply device communicating with the water flow channels 13 is installed inside the thin end head 11. Water channel 1102, with a return water channel 1201 connected to the water flow channel 13 installed inside the thick end head 12. There are two water inlet cylinders 2, with a hollow water inlet plug sleeve 21 installed at one end of the water inlet cylinder 2. The water inlet cylinder 2 passes through the structure formed by the two thin end heads 11 and is connected to the water supply channel 1102. There are two water outlet cylinders 3, with a hollow water outlet plug sleeve 31 installed at one end of the water outlet cylinder 3. The water outlet cylinder 3 passes through the structure formed by the two thick end heads 12 and is connected to the return water channel 1201. A liquid cooling system consisting of a water flow channel 13, a water supply channel 1102, and a water return channel 1201 replaces the traditional air-cooled heat exchange. The cooling liquid is evenly distributed to multiple water flow channels 13 on the casing 1 through the inlet cylinder 2, the water supply channel 1102, and the water supply hole 1103. When flowing over the battery surface, it can quickly absorb heat and then be collected in the outlet cylinder 3 through the water return channel 1201 and the drain hole 1202. The thermal conductivity of liquid is much higher than that of air, which can efficiently remove the heat generated by the stacked battery pack. It is especially suitable for heat-intensive scenarios such as high-power discharge and fast charging, avoiding sudden local temperature rises that trigger temperature control protection and ensuring stable battery performance.

[0017] See Figures 1-7The thin end head 11 has two first circular openings 1101 on one side. The water inlet tube 2 passes through the first circular opening 1101 and is connected and fixed to the thin end head 11. The first circular opening 1101 provides a stable installation space for the water inlet tube 2, ensuring that the water inlet tube 2 is firmly connected to the thin end head 11. The thick end head 12 has two second circular openings 1206 on one side. The water outlet tube 3 passes through the second circular opening 1206 and is connected and fixed to the thick end head 12. The second circular opening 1206 provides installation support for the water outlet tube 3, preventing the water outlet tube 3 from loosening under the impact of liquid flow. The first circular opening 1101 has a water supply hole 1105 that communicates with the internal space of the water inlet cylinder 2. The thin end head 11 has two first connecting parts 1104 for connecting the water supply channel 1102 and the water supply hole 1105. The first connecting parts 1104 are hollow. The water supply channel 1102 has a plurality of small water supply holes 1103 evenly opened on one side. The plurality of small water supply holes 1103 are respectively connected to a plurality of water flow channels 13. The second circular opening 1206 has a drain hole 1204 that communicates with the internal space of the water outlet cylinder 3. The thick end head 12 has two second connecting parts 1203 for connecting the return water channel 1201 and the drain hole 1204. The second connecting parts 1203 are hollow. The return water channel 1201 has a plurality of small drain holes 1202 evenly opened on one side. The plurality of small drain holes 1202 are respectively connected to a plurality of return water channels 1201. The first connecting portion 1104 in one thin end head 11 overlaps with the first connecting portion 1104 in another thin end head 11, and the opposite surfaces of the two overlapping first connecting portions 1104 are provided with first connecting holes 1106; the second connecting portion 1203 in one thick end head 12 overlaps with the second connecting portion 1203 in another thick end head 12, and the opposite surfaces of the two overlapping second connecting portions 1203 are provided with second connecting holes 1205. Multiple water flow channels 13 are evenly distributed on the side of the housing 1, which, together with the water supply holes 1103 on the water supply channel 1102 and the drain holes 1202 on the water return channel 1201, allow the cooling liquid to flow synchronously through the outer and middle layers of the stacked battery pack, avoiding the problem of "cool outer layer, hot middle layer" in air cooling. Regardless of the battery's position in the stack, it can fully contact the cooling liquid, significantly reducing the overall temperature difference of the battery pack, reducing battery uniformity degradation caused by uneven temperature, and extending the battery pack's lifespan.

[0018] See 1- Figure 7Sealing strips are provided between the two shells 1, between the two thin-end heads 11, between the two thick-end heads 12, between the two mating first connecting parts 1104, and between the two mating second connecting parts 1203. The inner diameter of the water inlet cylinder 2 is the same as the outer diameter of the water inlet plug sleeve 21, and the inner diameter of the water outlet cylinder 3 is the same as the outer diameter of the water outlet plug sleeve 31. Sealing rings are fitted on both the water inlet plug sleeve 21 and the water outlet plug sleeve 31. Sealing strips are installed between the two shells 1, between the thin-end heads 11, between the thick-end heads 12, and at the mating points of the first connecting parts 1104 and the second connecting parts 1203 to fill the gaps between the components and prevent coolant leakage. Especially for the high-pressure, high-humidity sensitive environment inside the battery pack, the sealing strips can effectively isolate the liquid from contact with the battery electrodes and circuits, avoid the risk of short circuits or corrosion, and ensure the safety of battery use. The sealing rings on the water inlet plug sleeve 21 and the water outlet plug sleeve 31 can enhance the sealing performance at the interface when the pipeline is connected, preventing liquid from leaking from the pipeline interface. Meanwhile, the size matching design of the water inlet cylinder 2 and the water inlet plug sleeve 21, and the water outlet cylinder 3 and the water outlet plug sleeve 31 ensures accurate pipe connection. Furthermore, the structure formed by one set of water inlet cylinders 2 and water inlet plug sleeve 21 can be plugged into the structure formed by another set of water inlet cylinders 2 and water inlet plug sleeve 21, and the structure formed by one set of water outlet cylinders 3 and water outlet plug sleeve 31 can be plugged into the structure formed by another set of water outlet cylinders 3 and water outlet plug sleeve 31, so as to achieve stable stacking of two adjacent battery packs and adapt to the assembly requirements of large-scale battery packs.

[0019] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A battery casing heat dissipation structure, characterized in that, include: There are two housings (1), which are interlocked with each other. Thin end head (11) and thick end head (12) are respectively installed at both ends of the housing (1). The thin end head (11) and thick end head (12) on one housing (1) are interlocked with the thin end head (11) and thick end head (12) on the other housing (1). Multiple water channels (13) are uniformly processed on one side of the housing (1). A water supply channel (1102) communicating with the water channel (13) is installed in the thin end head (11), and a water return channel (1201) communicating with the water channel (13) is installed in the thick end head (12). There are two water inlet cylinders (2). One end of the water inlet cylinder (2) is equipped with a hollow water inlet plug sleeve (21). The water inlet cylinder (2) passes through the structure formed by the two thin end heads (11). The water inlet cylinder (2) is connected to the water supply channel (1102). There are two water outlet tubes (3). One end of the water outlet tube (3) is equipped with a hollow water outlet plug sleeve (31). The water outlet tube (3) passes through the structure formed by the two thick end heads (12). The water outlet tube (3) is connected to the return water channel (1201).

2. The battery casing heat dissipation structure according to claim 1, characterized in that: The thin end head (11) has two first round openings (1101) on one side. The water inlet tube (2) passes through the first round opening (1101) and is connected and fixed to the thin end head (11). The thick end head (12) has two second round openings (1206) on one side. The water outlet tube (3) passes through the second round opening (1206) and is connected and fixed to the thick end head (12).

3. The battery casing heat dissipation structure according to claim 2, characterized in that: The first round opening (1101) is machined with a water supply hole (1105) that communicates with the internal space of the water inlet cylinder (2). The thin end head (11) is equipped with two first connecting parts (1104) for connecting the water supply channel (1102) and the water supply hole (1105). The first connecting part (1104) is a hollow structure. The water supply channel (1102) has a plurality of small water supply holes (1103) evenly opened on one side. The plurality of small water supply holes (1103) are respectively connected to a plurality of water flow channels (13).

4. The battery casing heat dissipation structure according to claim 3, characterized in that: The second round opening (1206) is machined with a drain hole (1204) that communicates with the internal space of the water outlet cylinder (3). The thick end head (12) is equipped with two second connecting parts (1203) for connecting the return water channel (1201) and the drain hole (1204). The second connecting part (1203) is a hollow structure. The return water channel (1201) has a plurality of small drain holes (1202) evenly opened on one side. The plurality of small drain holes (1202) are respectively connected to the plurality of return water channels (1201).

5. The battery casing heat dissipation structure according to claim 3, characterized in that: The first connecting portion (1104) in one of the thin end heads (11) overlaps with the first connecting portion (1104) in the other thin end head (11), and the two overlapping first connecting portions (1104) are provided with a first connecting hole (1106) on their opposite surfaces.

6. The battery casing heat dissipation structure according to claim 4, characterized in that: The second connecting portion (1203) in one of the thick end heads (12) overlaps with the second connecting portion (1203) in the other thick end head (12), and the two overlapping second connecting portions (1203) are provided with a second connecting hole (1205) on their opposite surfaces.

7. A battery casing heat dissipation structure according to claim 6, characterized in that: Sealing strips are provided between the two housings (1), between the two thin end heads (11), between the two thick end heads (12), between the two mating first connecting parts (1104), and between the two mating second connecting parts (1203).

8. The battery casing heat dissipation structure according to claim 1, characterized in that: The inner diameter of the inlet cylinder (2) is the same as the outer diameter of the inlet plug sleeve (21), and the inner diameter of the outlet cylinder (3) is the same as the outer diameter of the outlet plug sleeve (31). Both the inlet plug sleeve (21) and the outlet plug sleeve (31) are fitted with sealing rings.

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