Battery pack liquid cooling heat dissipation device

Abstract

The utility model discloses a battery pack liquid cooling heat dissipation device which comprises a liquid cooling aluminum plate, an upper battery cell module and a lower battery cell module, the upper battery cell module and the lower battery cell module are arranged on the opposite end faces of the liquid cooling aluminum plate, the side wall of the liquid cooling aluminum plate is provided with a liquid cooling pipeline for cooling liquid to flow in and out of the liquid cooling aluminum plate, and the opposite end faces of the liquid cooling aluminum plate are provided with limiting parts. And the fixing part is configured to fix the upper battery cell module and the lower battery cell module on the end surface of the liquid cooling aluminum plate. The liquid-cooled aluminum plate is simple in structure, the upper battery cell module and the lower battery cell module are respectively arranged on the two end surfaces of the liquid-cooled aluminum plate, so that the area of the liquid-cooled aluminum plate exposed in the air can be reduced, the problem that the liquid-cooled aluminum plate is exposed in the air to form an internal and external temperature difference so as to prevent condensation is solved, the cooling efficiency of the liquid-cooled aluminum plate is improved, and the service life of the liquid-cooled aluminum plate is prolonged. And the back surface of the liquid cooling aluminum plate can also cool the battery cell, so that the loss of cooling capacity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a liquid cooling and heat dissipation device for a battery pack. Background Art

[0002] In the existing method, the battery cells are placed on the cooler, and the cooler cools the battery cells. However, it can be seen that the bottom of the cooler is exposed to the air, and the cooling efficiency is relatively low. Because the cooler is lower than the surrounding temperature, condensation and other phenomena and problems will appear on the back. The condensation problem will bring other disasters such as insulation, corrosion and safety to the energy storage system. At the same time, the cooler area is particularly large, the material cost is particularly expensive, and the economy is particularly poor.

[0003] Many manufacturers are considering new cooling methods. The following two patent documents are retrieved:

[0004] Patent "CN218005007U-Battery pack liquid cooling device and vehicle" provides a battery pack liquid cooling device and vehicle. The battery pack liquid cooling device is used to cool multiple rows of battery cells and includes a bottom cold plate and a side cold plate. The bottom cold plate is used to receive multiple rows of battery cells arranged in sequence along the column direction. The number of side cold plates is less than the number of rows of battery cells. Each side of at least one side cold plate abuts against a row of battery cells. Although the provided battery pack liquid cooling device has the advantages of simple structure and low weight; however, in the patent, the heat dissipation efficiency is increased by adding side cold plates, and the cost is further increased.

[0005] The patent "CN220585315U-A battery cell liquid cooling system and battery module" discloses a battery cell cooling system, which includes an upper liquid cooling plate and a lower liquid cooling plate. The upper and lower liquid cooling plates are both provided with liquid cooling channels. The pipes of the upper and lower plates are connected to the liquid outlet assembly. The upper and lower liquid cooling plates are arranged in parallel with the discharge cell in the middle. The utility model improves the cooling efficiency of the battery cell, increases the effective rate charging time of the battery cell, and achieves lightweight at the same time.

[0006] In summary, in both inventions, the temperature of the battery cell is reduced by adding a condenser structural design, but neither of them takes condensation and economic issues into consideration. Therefore, a battery pack liquid cooling device is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide a battery pack liquid cooling and heat dissipation device to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a battery pack liquid-cooled heat dissipation device, comprising a liquid-cooled aluminum plate and an upper battery cell module and a lower battery cell module at opposite end faces of the liquid-cooled aluminum plate, the side wall of the liquid-cooled aluminum plate is installed with a liquid-cooled pipe for supplying cooling liquid to and from the inside of the liquid-cooled aluminum plate, and the opposite end faces of the liquid-cooled aluminum plate are both installed with limiting parts, which are configured to fix the upper battery cell module and the lower battery cell module on the end face of the liquid-cooled aluminum plate.

[0009] As a further solution of the utility model: the upper battery cell module and the lower battery cell module are both composed of multiple groups of battery cells and multiple groups of structures, wherein the multiple groups of battery cells are arranged in a criss-cross pattern, and the multiple groups of battery cells are fixed on the outside by the structures to form a battery cell module.

[0010] As a further solution of the utility model: the limiting part is specifically a rivet column, and the number of the rivet columns is multiple, and the ends of the multiple rivet columns all penetrate the upper battery cell module or the lower battery cell module and are threadedly connected to the end surface of the liquid-cooled aluminum plate.

[0011] As a further solution of the utility model: two limit bars are installed on the opposite end faces of the liquid-cooled aluminum plate, and the two limit bars are arranged in parallel and respectively located on the opposite sides of the upper battery cell module, and are configured to limit the position of the upper battery cell module.

[0012] As a further solution of the utility model: the limiting part includes four corner blocks respectively located at the four corners of the upper battery cell module, and is configured to play a limiting role corresponding to the corners of the structure. Fixed blocks are installed on the surfaces of the four corner blocks, and positioning bolts are installed on the surfaces of the fixing blocks, the ends of which pass through them and are threadedly connected to the surface of the liquid-cooled aluminum plate.

[0013] As a further solution of the utility model: the liquid cooling pipeline includes a liquid cooling water inlet and a liquid cooling water outlet which are arranged on the surface of the liquid cooling aluminum plate and connected to the interior thereof.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. By respectively arranging the upper battery cell module and the lower battery cell module on the two end surfaces of the liquid-cooled aluminum plate, the area of ​​the liquid-cooled aluminum plate exposed to the air can be reduced, solving the problem of the liquid-cooled aluminum plate exposed to the air to form an internal and external temperature difference to prevent the generation of condensation. Secondly, the cooling efficiency of the liquid-cooled aluminum plate is improved, and the back of the liquid-cooled aluminum plate can also cool the battery cell, reducing the loss of cooling capacity.

[0016] 2. By setting the limit part, the battery cell module can be fixed on the surface of the liquid-cooled aluminum plate, which has a better assembly effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a battery liquid cooling and heat dissipation device of the utility model;

[0018] Figure 2 It is a schematic side view of the battery liquid cooling and heat dissipation device of the utility model;

[0019] Figure 3 This is a schematic diagram of a first embodiment of the limiting part of the utility model;

[0020] Figure 4 This is a schematic diagram of a second embodiment of the limiting portion of the utility model;

[0021] Figure 5 This is a schematic diagram of a battery module of the utility model;

[0022] In the figure: 1. Upper battery cell module; 2. Liquid-cooling aluminum plate; 3. Liquid-cooling pipe; 4. Lower battery cell module; 5. Limiting strip; 6. Rivet column; 7. Angle block; 8. Fixing block; 9. Positioning bolt. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 In an embodiment of the utility model, a battery pack liquid cooling heat dissipation device includes a liquid cooling aluminum plate 2 and an upper battery cell module 1 and a lower battery cell module 4 at opposite end surfaces of the liquid cooling aluminum plate 2. A liquid cooling pipe 3 for supplying cooling liquid to and from the inside of the liquid cooling aluminum plate 2 is installed on the side wall of the liquid cooling aluminum plate 2. The liquid cooling pipe 3 includes a liquid cooling water inlet and a liquid cooling water outlet which are arranged on the surface of the liquid cooling aluminum plate 2 and connected to the inside thereof. Limiting portions are installed on the opposite end surfaces of the liquid cooling aluminum plate 2, and are configured to fix the upper battery cell module 1 and the lower battery cell module 4 on the end surfaces of the liquid cooling aluminum plate 2.

[0025] Specifically, the upper battery cell module 1 and the lower battery cell module 4 are respectively located on the upper and lower end surfaces of the liquid-cooled aluminum plate 2. In this way, the number of cooled battery cells can be doubled without increasing the area of ​​the cooler, which greatly improves the utilization efficiency of the cooler and reduces the cost of the system. At the same time, there are battery cells above and below the cooler without external air, which reduces condensation. Secondly, under the action of the limiting part, the position of the upper battery cell module 1 and the lower battery cell module 4 can be stably fixed on the liquid-cooled aluminum plate 2, thereby achieving a better assembly effect.

[0026] See also Figure 1In one embodiment, in this embodiment, preferably, the upper battery cell module 1 and the lower battery cell module 4 are both composed of multiple groups of battery cells and multiple groups of structures, wherein the multiple groups of battery cells are arranged in a criss-cross pattern, and the multiple groups of battery cells are fixed on the outside by the structure to form a battery cell module.

[0027] See also Figure 3 In one embodiment, in this embodiment, preferably, the limiting portion is specifically a rivet column 6, and the number of the rivet columns 6 is multiple, and the ends of the multiple rivet columns 6 all pass through the upper battery cell module 1 or the lower battery cell module 4 and are threadedly connected with the end surface of the liquid-cooling aluminum plate 2. During installation, after the rivet column 6 passes through the upper battery cell module 1 or the lower battery cell module 4, the upper battery cell module 1 or the lower battery cell module 4 can be fixed by the end of its large head, and then the position of the liquid-cooling aluminum plate 2 is fixed by the end with a thread, thereby achieving a better assembly effect. Even if it is loosened over a long time or for some reason, it will fit tightly together due to its own weight, and the upper and lower batteries can be well dissipated.

[0028] See also Figure 2 In one embodiment, in this embodiment, preferably, two limit bars 5 are installed on the opposite end surfaces of the liquid-cooled aluminum plate 2, and the two limit bars 5 are arranged in parallel and respectively located on the opposite sides of the upper battery cell module 1, and are configured to limit the position of the upper battery cell module 1. The limit bars 5 further symmetrically arranged on the opposite sides of the upper battery cell module 1 can preliminarily limit the position of the upper battery cell module 1, which facilitates the subsequent insertion of the rivet column 6 into the corresponding internal threaded hole on the liquid-cooled aluminum plate 2 more smoothly.

[0029] See also Figure 4-5 In another embodiment, in this embodiment, preferably, the limiting portion includes four corner blocks 7 respectively located at the four corners of the upper battery cell module 1, and is configured to play a limiting role corresponding to the corners of the architecture. The surfaces of the four corner blocks 7 are all installed with fixing blocks 8, and the surface of the fixing blocks 8 is installed with positioning bolts 9 whose ends pass through them and are threadedly connected to the surface of the liquid-cooled aluminum plate 2.

[0030] Specifically, the four corner blocks 7 correspond to the four corners of the structure respectively. Before installation, the upper cell module 1 is placed on the surface of the liquid-cooled aluminum plate 2, and then the four corner blocks 7 are placed in turn on the four corners of the structure. Then, the positioning bolt 9 is used to pass through the fixing block 8 connected to the corner block 7, and then the positioning bolt 9 is rotated to make the positioning bolt 9 and the liquid-cooled aluminum plate 2 threadedly connected, thereby achieving the effect of fixing the upper cell module 1.

[0031] Compared with the first embodiment, this embodiment requires more components, but it can avoid opening holes in the battery cell module. The specific limiting part to be used can be selected according to actual conditions.

[0032] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0033] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A battery pack liquid cooling device, characterized in that: The invention comprises a liquid-cooled aluminum plate (2) and an upper battery cell module (1) and a lower battery cell module (4) at opposite end surfaces of the liquid-cooled aluminum plate (2); a liquid-cooled pipe (3) for cooling liquid to enter and exit the liquid-cooled aluminum plate (2) is installed on the side wall of the liquid-cooled aluminum plate (2); and limiting parts are installed on the opposite end surfaces of the liquid-cooled aluminum plate (2) and are configured to fix the upper battery cell module (1) and the lower battery cell module (4) on the end surface of the liquid-cooled aluminum plate (2).

2. The battery pack liquid cooling and heat dissipation device according to claim 1, characterized in that: The upper battery cell module (1) and the lower battery cell module (4) are both composed of multiple groups of battery cells and multiple groups of structures, wherein the multiple groups of battery cells are arranged in a crisscross pattern, and the multiple groups of battery cells are fixed on their outer sides by the structures to form a battery cell module.

3. The battery pack liquid cooling and heat dissipation device according to claim 2, characterized in that: The limiting portion is specifically a rivet column (6), and there are a plurality of rivet columns (6), and the ends of the plurality of rivet columns (6) all penetrate the upper battery cell module (1) or the lower battery cell module (4) and are threadedly connected to the end surface of the liquid-cooled aluminum plate (2).

4. The battery pack liquid cooling and heat dissipation device according to claim 3, characterized in that: Two limit bars (5) are installed on opposite end faces of the liquid-cooled aluminum plate (2), and the two limit bars (5) are arranged in parallel and respectively located on opposite sides of the upper battery cell module (1), and are configured to limit the position of the upper battery cell module (1).

5. The battery pack liquid cooling and heat dissipation device according to claim 2, characterized in that: The limiting portion comprises four corner blocks (7) respectively located at the four corners of the upper battery core module (1), and configured to correspond to the corners of the structure to play a limiting role, and the surfaces of the four corner blocks (7) are all installed with fixing blocks (8), and the surfaces of the fixing blocks (8) are installed with positioning bolts (9) whose ends penetrate through them and are threadedly connected to the surface of the liquid-cooling aluminum plate (2).

6. The battery pack liquid cooling and heat dissipation device according to claim 1, characterized in that: The liquid cooling pipeline (3) comprises a liquid cooling water inlet and a liquid cooling water outlet which are arranged on the surface of the liquid cooling aluminum plate (2) and connected to the interior thereof.

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