A new energy vehicle battery pack heat dissipation system

Abstract

This utility model relates to a heat dissipation system for a new energy vehicle battery pack, belonging to the field of automotive battery pack heat dissipation technology. It includes a heat-conducting plate for dissipating heat from the vehicle battery pack, a water inlet plate and corresponding water inlet components, and a drain plate and corresponding drain components. Two heat-conducting plates are symmetrically arranged on both sides of the water inlet plate. The drain plates correspond one-to-one with the heat-conducting plates and are located below them. The heat-conducting plates have several water-guiding grooves, and the water inlet plate has primary openings corresponding to these grooves. The drain plates have several drain channels, which communicate with the drain channels below through secondary openings in the heat-conducting and drain plates. The new energy vehicle battery pack heat dissipation system provided by this utility model, through the cooperation of the heat-conducting plates, water-guiding grooves, secondary openings, drain plates, and drain channels, shortens the contact path between the coolant and the heat-conducting plates used to absorb heat from the battery pack, thereby enhancing heat dissipation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of automotive battery pack heat dissipation technology, specifically relating to a heat dissipation system for a new energy vehicle battery pack. Background Technology

[0002] Battery packs are the power source for new energy vehicles. Overheating of battery packs not only reduces the cycle life of the battery, but also causes problems such as thermal runaway and charging limitations. To ensure the stable and safe operation of automotive battery packs, existing new energy vehicle battery packs are equipped with corresponding cooling systems. The existing automotive battery pack cooling systems can be broadly divided into three categories: air cooling, liquid cooling, and direct cooling. Among them, liquid cooling systems have the characteristics of high heat dissipation efficiency, precise temperature control, and high safety, and are therefore the most widely used.

[0003] The existing automotive battery liquid cooling system is a water-cooled plate. The coolant passage in the water-cooled plate is connected to the vehicle's air conditioning heat exchanger through connecting pipes. The water-cooled plate can be laid flat on top of the battery pack or placed between the individual battery packs that make up the battery pack. When the coolant flows in the water-cooled plate, the heat on the battery packs in contact with the water-cooled plate can be quickly carried away, thereby achieving a highly efficient heat dissipation effect.

[0004] However, the coolant pipes in the existing automotive battery liquid cooling systems are all unidirectional, and the coolant has a long flow path within the water-cooling plate. During the long flow of the coolant along the pipe, it will come into contact with multiple battery packs in sequence, which will inevitably lead to the cooling effect of the battery packs at the end of the coolant flow path being unsatisfactory. This can easily lead to excessive temperature difference in the overall automotive battery pack. In order to address the above problems, this utility model proposes a heat dissipation system for new energy vehicle battery packs. Utility Model Content

[0005] The purpose of this invention is to provide a heat dissipation system for new energy vehicle battery packs in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] This utility model provides a heat dissipation system for a new energy vehicle battery pack, including a heat-conducting plate for conducting heat outward from the vehicle battery pack, a water inlet plate and a corresponding water inlet component, and a drain plate and a corresponding drain component. The heat-conducting plate includes two plates symmetrically arranged on both sides of the water inlet plate. The drain plate corresponds to the heat-conducting plate and is located below the corresponding heat-conducting plate. The heat-conducting plate has a plurality of water-guiding grooves, and the water inlet plate has a primary outlet corresponding to each water-guiding groove. The drain plate has a plurality of drain grooves, and the water-guiding grooves are connected to the drain grooves below through secondary outlets in the heat-conducting plate and the drain plate.

[0008] As a further optimization of this utility model, the water guiding channel is arranged horizontally and the drainage channel is arranged vertically, and both the water guiding channel and the drainage channel are arranged in a linear array.

[0009] As a further optimization of this utility model, the water inlet assembly includes a water inlet pan and a water inlet pipe connected to its outer side, and the water inlet plate is connected to the water inlet pan.

[0010] As a further optimization of this utility model, the drainage component includes a manifold and a drain pipe connected to its outer side. The manifold and the drain plate correspond one-to-one. The manifold is set on the drain plate and the drain grooves in the manifold are all connected to the drain plate. The manifold and the water inlet plate are located on the same side, and the two drain pipes are distributed on both sides of the water inlet pipe.

[0011] As a further optimization of this utility model, a number of evenly distributed separators are provided above the heat-conducting plate. The separators are used to separate the battery packs that make up the automotive battery pack. The separators include a diverter plate that communicates with the water inlet plate. Both sides of the top of the diverter plate are provided with a diverter pipe. A diverter curtain is provided below the diverter pipe. A number of DC grooves arranged in a linear array are opened in the diverter curtain. A three-stage opening corresponding to the DC grooves is opened in both the heat-conducting plate and the drainage plate. The DC grooves are connected to the drainage grooves below through the three-stage openings.

[0012] As a further optimization of this utility model, several uniformly distributed heat-conducting patches are embedded on both sides of the partition curtain.

[0013] The beneficial effects of this utility model are as follows:

[0014] This new energy vehicle battery pack cooling system utilizes a heat-conducting plate to conduct heat from the battery pack. Through the cooperation of water guide channels, secondary channels, drainage plates, and drainage channels, the coolant can be guided to flow evenly through the heat-conducting plate, thereby achieving uniform cooling of the battery pack. Furthermore, the paired arrangement of the water guide channels, secondary channels, and drainage channels ensures that the coolant maintains a multi-point input and multi-point output flow pattern when flowing through the heat-conducting plate, effectively shortening the contact path of the coolant with the heat-conducting plate. This allows the coolant to quickly flow out of the heat-conducting plate after fully absorbing heat, preventing heat from accumulating inside the heat-conducting plate for a long time, thus improving the heat absorption efficiency of the heat-conducting plate and enhancing the cooling efficiency of the vehicle battery pack. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall appearance of this utility model;

[0016] Figure 2 This is a schematic diagram showing the separation of the heat-conducting plate and the drainage plate;

[0017] Figure 3 This is a schematic diagram of the partition component being disassembled;

[0018] Figure 4 It is a cross-sectional view of the water inlet plate, heat conduction plate and drain plate in combination;

[0019] Figure 5 This is a cross-sectional view of the drainage board and the manifold in operation.

[0020] In the diagram: 1. Inlet plate; 2. Heat-conducting plate; 3. Water guide channel; 4. Primary inlet; 5. Drain plate; 6. Drain channel; 7. Secondary inlet; 8. Diverter plate; 9. Diverter pipe; 10. Divider curtain; 11. Direct current channel; 12. Heat-conducting patch; 13. Tertiary inlet; 14. Inlet tray; 15. Inlet pipe; 16. Manifold; 17. Drain pipe. Detailed Implementation

[0021] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] Example 1

[0023] like Figure 1-5 As shown, the new energy vehicle battery pack cooling system of this embodiment includes a heat-conducting plate 2 for conducting heat out of the vehicle battery pack, a water inlet plate 1 and a corresponding water inlet component, and a drain plate 5 and a corresponding drain component. The heat-conducting plate 2 includes two plates symmetrically arranged on both sides of the water inlet plate 1. The drain plate 5 corresponds to the heat-conducting plate 2 and is located below the corresponding heat-conducting plate 2. The heat-conducting plate 2 has a plurality of water-guiding grooves 3 and the water inlet plate 1 has a primary outlet 4 corresponding to the water-guiding grooves 3. The drain plate 5 has a plurality of drain grooves 6. The water-guiding grooves 3 are connected to the drain grooves 6 below through the secondary outlets 7 in the heat-conducting plate 2 and the drain plate 5. The heat-conducting plate 2 is made of heat-conducting metal or alloy material, and the drain plate 5 is made of heat-insulating material.

[0024] The automotive battery pack cooling system is installed at the bottom of the automotive battery casing. The battery packs that make up the automotive battery pack are evenly arranged on the heat-conducting plate 2. The water inlet plate 1 and the drain plate 5 are connected to the automotive coolant circulation channel through the water inlet assembly and the drain assembly, respectively. When the battery pack heats up, the heat-conducting plate 2 will continuously absorb the heat from the battery pack above it. After the coolant enters the water inlet plate 1, it flows through the primary outlet 4 and splits to both sides. Then it flows through the water guide channel 3, the secondary outlet 7, the drain plate 5 and the drain assembly in sequence before being output. When the coolant passes through each water guide channel 3, it can carry away the heat on the heat-conducting plate 2. In a single water guide channel 3, the coolant that has absorbed heat and increased in temperature can flow downward into the drain plate 5 through several secondary outlets 7 that are evenly distributed in the flow path. That is, the coolant that has absorbed heat will quickly move away from the heat-conducting plate 2, effectively shortening the heat absorption path of the coolant. This can avoid the problem of heat accumulating in the heat-conducting plate 2 for a long time, which is conducive to improving the heat conduction efficiency of the heat-conducting plate 2, and thus improving the cooling efficiency of the automotive battery pack.

[0025] Preferably, the water guide channel 3 is arranged horizontally and the drainage channel 6 is arranged vertically, and both the water guide channel 3 and the drainage channel 6 are arranged in a linear array. The cross-distribution flow direction can improve the output efficiency of the coolant in the heat conduction plate 2, and the uniform distribution of the water guide channel 3 and the drainage channel 6 can ensure the uniformity of the cooling effect.

[0026] Preferably, the water inlet assembly includes a water inlet tray 14 and a water inlet pipe 15 connected to its outer side, and the water inlet plate 1 is connected to the water inlet tray 14.

[0027] Preferably, the drainage assembly includes a manifold 16 and a drain pipe 17 connected to its outer side. The manifold 16 corresponds one-to-one with the drain plate 5. The manifold 16 is disposed on the drain plate 5 and the drain grooves 6 in the manifold 16 are all connected to the drain plate 5. The manifold 16 and the water inlet plate 14 are located on the same side, and the two drain pipes 17 are distributed on both sides of the water inlet pipe 15.

[0028] Preferably, the heat-conducting plate 2 has several evenly distributed separators above it. These separators separate the battery packs that make up the automotive battery pack. Each separator includes a diverter plate 8 connected to the inlet plate 1. Diverter pipes 9 are connected to both sides of the top of the diverter plate 8. A dividing curtain 10 is located below the diverter pipes 9. Several linearly arrayed direct current channels 11 are formed within the dividing curtain 10. Both the heat-conducting plate 2 and the drain plate 5 have three-stage openings 13 corresponding to the direct current channels 11. The direct current channels 11 are connected to the drain channel 6 below through the three-stage openings 13. Part of the coolant in the water plate 1 will enter the drain tank 6 after passing through the distributor plate 8, distributor pipe 9, separator curtain 10 and three-stage inlet 13 in sequence. During this process, it can absorb and carry away the heat on the battery pack from the side, thereby enhancing the heat dissipation effect. During the assembly process, the separator curtain 10 is not filled with water and has a small volume. At this time, the space between the separators is relatively large, which makes it convenient to place and install the battery pack. After the installation is completed, the coolant enters the separator curtain 10 to expand it. The separator curtain 10 is close to the side wall of the battery pack, which is conducive to uniform heat absorption and can also stabilize the battery pack.

[0029] Preferably, a number of uniformly distributed heat-conducting patches 12 are embedded on both sides of the partition curtain 10, which can further improve the heat conduction efficiency.

[0030] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A heat dissipation system for a new energy vehicle battery pack, comprising a heat-conducting plate (2) for externally dissipating heat from the vehicle battery pack, characterized in that, It also includes a water inlet plate (1) and a corresponding water inlet component, and a drain plate (5) and a corresponding drain component. The heat conduction plate (2) includes two and is symmetrically arranged on both sides of the water inlet plate (1). The drain plate (5) corresponds one-to-one with the heat conduction plate (2) and is located below the corresponding heat conduction plate (2). The heat conduction plate (2) has several water guide grooves (3) and the water inlet plate (1) has a primary outlet (4) corresponding one-to-one with the water guide grooves (3). The drain plate (5) has several drain grooves (6). The water guide grooves (3) are connected to the drain grooves (6) below through the secondary outlets (7) in the heat conduction plate (2) and the drain plate (5).

2. The heat dissipation system for a new energy vehicle battery pack according to claim 1, characterized in that, The water guide channel (3) is arranged horizontally, and the drainage channel (6) is arranged vertically, and both the water guide channel (3) and the drainage channel (6) are arranged in a linear array.

3. The heat dissipation system for a new energy vehicle battery pack according to claim 1, characterized in that, The water inlet assembly includes a water inlet plate (14) and a water inlet pipe (15) connected to its outer side, and the water inlet plate (1) is connected to the water inlet plate (14).

4. The heat dissipation system for a new energy vehicle battery pack according to claim 1, characterized in that, The drainage assembly includes a manifold (16) and a drain pipe (17) connected to its outer side. The manifold (16) corresponds one-to-one with the drain plate (5). The manifold (16) is set on the drain plate (5) and the drain grooves (6) in the manifold (16) are all connected to the drain plate (5). The manifold (16) and the water inlet plate (14) are located on the same side. The two drain pipes (17) are distributed on both sides of the water inlet pipe (15).

5. A new energy vehicle battery pack cooling system according to claim 1, characterized in that, The heat-conducting plate (2) is provided with several evenly distributed partitions above it. The partitions are used to separate the battery packs that make up the car battery pack. The partitions include a diverter plate (8) that communicates with the water inlet plate (1). Both sides of the top of the diverter plate (8) are provided with diverter pipes (9). A partition curtain (10) is provided below the diverter pipes (9). Several DC grooves (11) arranged in a linear array are opened in the partition curtain (10). The heat-conducting plate (2) and the drainage plate (5) are both provided with three-stage openings (13) corresponding to the DC grooves (11). The DC grooves (11) are connected to the drainage grooves (6) below through the three-stage openings (13).

6. A new energy vehicle battery pack cooling system according to claim 5, characterized in that, Several uniformly distributed heat-conducting patches (12) are embedded on both sides of the partition curtain (10).

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