Battery module heat dissipation structure

Abstract

The utility model discloses a battery module heat dissipation structure, which comprises a stamping plate (100), a substrate (200) arranged on the stamping plate (100) and a battery module (300) arranged on the substrate (200), the stamping plate (100) is provided with an S-shaped flow channel (101), the S-shaped flow channel (101) is provided with a liquid inlet (1011), a liquid outlet (1012) and a main flow channel (1013) communicated with the liquid inlet (1011) and the liquid outlet (1012), and the main flow channel (1013) is communicated with the liquid inlet (1011) and the liquid outlet (1012). The S-shaped flow channel (101) is symmetrical about the middle line of the stamping plate (100) in the length direction. Due to the adoption of the structural design, the S-shaped flow channels which are symmetrical about the middle line of the stamping plate in the length direction are arranged on the stamping plate, so that the maximum temperature difference of the battery module is controlled to be about 2 DEG C, and the heat dissipation effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a heat dissipation structure of a battery module. Background Art

[0002] Lithium batteries are currently widely used and have a good prospect for development. However, with the continuous development of technology, the lithium battery industry has also fallen into a bottleneck. Among them, the heat dissipation of batteries is an important issue. Lithium batteries generate heat during use. If the heat cannot be dissipated in time, the temperature of the battery will be too high, affecting its normal use. At the same time, if the temperature of the battery is too high, it will also increase its internal pressure, create safety hazards, and reduce the service life of the battery.

[0003] The Chinese utility model patent with the announcement number CN217158326U discloses a battery module, including a plurality of cells arranged side by side to form a cell group, and also including an upper cover plate arranged above the cell group and a lower cover plate arranged below the cell group; a heat sink is provided on one side of each cell in the thickness direction, and the heat sink is abutted against the corresponding side of the cell to achieve heat dissipation of the cell; the heat sink includes a cell abutting plate body for abutting against the side of one side in the thickness direction of the cell to conduct the heat of the cell, and the cell abutting plate body is provided with a corrugated wave structure, the corrugated wave structure forms a groove on one side of the heat sink in the thickness direction, and forms a protrusion on the other side of the heat sink in the thickness direction; the side of one side in the thickness direction of the cell and the groove form an air duct for air flow to pass through. The above-mentioned battery module adopts air cooling for heat dissipation, and its heat dissipation effect is general, which cannot meet the increasingly high requirements of modern society and industry for the heat dissipation structure of battery modules.

[0004] Therefore, the prior art needs to be improved and enhanced. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a battery module heat dissipation structure with better heat dissipation effect.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A battery module heat dissipation structure includes a stamping plate, a substrate arranged on the stamping plate, and a battery module arranged on the substrate, the stamping plate has an S-shaped flow channel, the S-shaped flow channel has a liquid inlet, a liquid outlet, and a main flow channel connected to the liquid inlet and the liquid outlet, and the S-shaped flow channel is symmetrical about the midline of the stamping plate along the length direction.

[0008] As a further solution of the utility model, the liquid inlet is connected to two branch channels, and the two branch channels are connected to the main channel.

[0009] As a further solution of the utility model, the branch channel is provided with a plurality of convex bumps evenly distributed along the length direction near the liquid inlet.

[0010] As a further solution of the utility model, the liquid inlet is connected to a liquid inlet nozzle, and / or the liquid outlet is connected to a liquid outlet nozzle.

[0011] As a further solution of the utility model, the base plate and the stamping plate are connected by brazing.

[0012] As a further solution of the utility model, the liquid inlet nozzle and / or the liquid outlet nozzle are mounted on the substrate by welding, the liquid inlet nozzle is connected to the liquid inlet, and the liquid outlet nozzle is connected to the liquid outlet.

[0013] As a further solution of the utility model, a heat-conducting structural adhesive is coated between the battery module and the substrate.

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

[0015] Due to the above structural design, that is, the stamping plate is provided with an S-shaped flow channel symmetrical about the midline of the stamping plate along the length direction, the maximum temperature difference of the battery module is controlled at about 2 degrees, and the heat dissipation effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Attached Figure 2 It is a schematic diagram of the exploded structure of an embodiment of the utility model;

[0018] Attached Figure 3 A top view of a substrate according to an embodiment of the present utility model;

[0019] Attached Figure 4 It is a top view of the stamping plate of the embodiment of the utility model.

[0020] The numbers in the figure are:

[0021] 100-stamping plate, 200-substrate, 300-battery module;

[0022] 101-S type flow channel;

[0023] 1011-liquid inlet, 1012-liquid outlet, 1013-main channel;

[0024] 1011a - first branch channel, 1011b - second branch channel, 1101c - first convex hull, 1101d - second convex hull;

[0025] 1012a - third branch channel, 1012b - fourth branch channel, 1102c - third convex hull, 1102d - fourth convex hull;

[0026] Liquid inlet nozzle, 202-liquid outlet nozzle. DETAILED DESCRIPTION

[0027] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the utility model. These all fall within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0029] like Figure 1-4 As shown, the present application discloses a heat dissipation structure for a battery module, comprising a stamping plate 100, a substrate 200 disposed on the stamping plate 100, and a battery module 300 disposed on the substrate, the stamping plate 100 having an S-shaped flow channel 101, the S-shaped flow channel 101 having a liquid inlet 1011, a liquid outlet 1012, and a main flow channel 1013 connected to the liquid inlet 1011 and the liquid outlet 1012, the S-shaped flow channel 101 being symmetrical about the center line of the stamping plate 100 along the length direction. Through the above-mentioned structural design, the stamping plate 100 is provided with an S-shaped flow channel 101 that is symmetrical about the center line of the stamping plate 100 along the length direction, and after verification by CFD fluid heat transfer simulation, it is possible to control the maximum temperature difference of the battery module 300 to about 2 degrees, and the heat dissipation effect is good. Of course, since the S-shaped flow channel 101 is symmetrical about the midline of the stamping plate along the length direction, the liquid inlet 1011 and the liquid outlet 1012 can be specifically arranged according to the actual application scenario, that is, the liquid inlet 1011 can also be used as the liquid outlet, and the liquid outlet 1012 can also be used as the liquid inlet, so that the heat dissipation effect of the battery module 300 is not affected by the flow direction of the liquid cooling medium, the compatibility is high, and the R&D and production costs are saved.

[0030] Specifically, the liquid inlet 1011 is connected to two branch channels, namely the first branch channel 1011a and the second branch channel 1011b, and the two branch channels are connected to the main channel 1013; since the S-shaped channel 101 is symmetrical about the midline of the stamping plate 100 along the length direction, the liquid outlet 1012 is also connected to two branch channels connected to the main channel 1013, namely the third branch channel 1012a and the fourth branch channel 1012b. By respectively providing two branch channels at the liquid inlet 1011 and the liquid outlet 1012, the heat dissipation efficiency is further improved.

[0031] As a preferred embodiment of the present invention, the first branch channel 1011a is provided with a plurality of first convex bumps 1011c uniformly distributed along the length direction near the liquid inlet 1011, the second branch channel 1011b is provided with a plurality of second convex bumps 1011d uniformly distributed along the length direction near the liquid inlet 1011, the third branch channel 1012a is provided with a plurality of third convex bumps 1012c uniformly distributed along the length direction near the liquid outlet 1012, and the fourth branch channel 1012b is provided with a plurality of third convex bumps 1012c uniformly distributed along the length direction near the liquid outlet 1012. A plurality of fourth bulges 1012d are respectively provided with the first bulge 1011c, the second bulge 1011d, the third bulge 1012c and the fourth bulge 1012d in the first branch channel 1011a, the second branch channel 1011b, the third branch channel 1012a and the fourth branch channel 1012b, so as to increase the turbulence of the liquid cooling medium entering the S-shaped flow channel during the flow in the S-shaped flow channel, which is beneficial to thinning the heat transfer boundary layer between the liquid cooling medium and the inner wall of the flow channel, thereby enhancing the convective heat transfer effect.

[0032] Specifically, the liquid inlet 1011 is connected to a liquid inlet nozzle 201, and / or the liquid outlet 1012 is connected to a liquid outlet nozzle 202. The liquid inlet nozzle 201 and / or the liquid outlet nozzle 202 are installed on the substrate 200 by welding. The liquid inlet nozzle 201 is connected to the liquid inlet 1011, and the liquid outlet nozzle 202 is connected to the liquid outlet 1012.

[0033] Specifically, the base plate 200 and the stamping plate 100 are connected by brazing.

[0034] Specifically, a thermally conductive structural adhesive is coated between the battery module 300 and the substrate 200. The heat in the battery module 300 can be transferred to the substrate 200 through the thermally conductive structural adhesive. While performing a heat conduction function, the thermally conductive structural adhesive also serves to fix the battery module, thereby ensuring the stability of the structure.

[0035] In summary, the present invention solves the deficiencies in the prior art through the above-mentioned structural design, and has the characteristics of reasonable structure and good heat dissipation effect.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery module heat dissipation structure, characterized in that: The invention comprises a stamping plate (100), a substrate (200) arranged on the stamping plate (100), and a battery module (300) arranged on the substrate (200); the stamping plate (100) has an S-shaped flow channel (101); the S-shaped flow channel (101) has a liquid inlet (1011), a liquid outlet (1012), and a main flow channel (1013) connected to the liquid inlet (1011) and the liquid outlet (1012); the S-shaped flow channel (101) is symmetrical about the midline of the stamping plate (100) along the length direction.

2. The battery module heat dissipation structure according to claim 1, characterized in that: The liquid inlet (1011) is connected to two branch flow channels, and the two branch flow channels are connected to the main flow channel (1013).

3. The battery module heat dissipation structure according to claim 2, characterized in that: The branch channel is provided with a plurality of convex humps evenly distributed along the length direction near the liquid inlet.

4. The battery module heat dissipation structure according to claim 3, characterized in that: The liquid inlet (1011) is connected to a liquid inlet nozzle (201), and / or the liquid outlet (1012) is connected to a liquid outlet nozzle (202).

5. The battery module heat dissipation structure according to claim 4, characterized in that: The base plate (200) and the stamping plate (100) are connected by brazing.

6. The battery module heat dissipation structure according to claim 5, characterized in that: The liquid inlet nozzle (201) and / or the liquid outlet nozzle (202) are mounted on the substrate (200) by welding; the liquid inlet nozzle (201) is connected to the liquid inlet (1011), and the liquid outlet nozzle (202) is connected to the liquid outlet (1012).

7. The battery module heat dissipation structure according to claim 6, characterized in that: A heat-conductive structural adhesive is applied between the battery module (300) and the substrate (200).

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