Double-layer battery cell module heat dissipation mechanism for battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to a double-layer battery cell module heat dissipation mechanism for a battery pack, which comprises an upper-layer liquid cooling plate and a lower-layer liquid cooling plate, an upper-layer liquid inlet and an upper-layer liquid outlet are symmetrically formed in the upper-layer liquid cooling plate corresponding to the two sides of the liquid cooling pipeline through groove; a lower-layer liquid inlet and a lower-layer liquid outlet are symmetrically formed in the lower-layer liquid cooling plate corresponding to the liquid cooling pipeline through groove; a vertical lower-layer liquid inlet pipe is arranged on the lower-layer liquid inlet, a horizontal upper-layer liquid inlet pipe is arranged on the upper-layer liquid inlet, and the upper-layer liquid inlet pipe is connected with the lower-layer liquid inlet pipe through a three-way liquid inlet connector; a vertical lower-layer liquid outlet pipe is arranged on the lower-layer liquid outlet, a horizontal upper-layer liquid outlet pipe is arranged on the upper-layer liquid outlet, and the upper-layer liquid outlet pipe is connected with the lower-layer liquid outlet pipe through a three-way liquid outlet connector. The heat dissipation mechanism is simple in structure and easy to assemble, can be stably connected with the box body, and can continuously dissipate heat for the battery cell module.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a heat dissipation mechanism for a double-layer cell module in a battery pack. Background Technology

[0002] Currently, new energy vehicles have received widespread attention from all sectors of society due to their excellent environmental performance, and the requirements for them are constantly increasing. As a type of new energy vehicle, electric vehicles are also developing towards higher safety, higher energy density, and lighter weight. The main factor determining the driving range of an electric vehicle is the power supply battery. Different specifications of power supply batteries can be selected for different vehicle models to meet driving requirements.

[0003] Battery packs for electric vehicles typically consist of multiple cell modules. These modules are stacked within the same housing and then connected to each other. The core cell module is configured with a specific number of cells to meet the required output voltage, and all cells are then connected to output the voltage. To meet the battery's power requirements, cell modules are usually arranged as modules, with at least two modules stacked and electrically connected to each other. Stacking methods include horizontal or vertical stacking.

[0004] Traditionally, vertical stacking of double-layer battery cell modules involves directly stacking them. However, since the cell modules generate a significant amount of heat during operation, without cooling, this can lead to excessive heat buildup within the battery pack, potentially causing combustion or even explosion. A traditional method for cooling vertically stacked cell modules involves placing a liquid cooling plate at the bottom of the battery pack housing. However, this method only cools the cell modules at the bottom, having no effect on the upper layers. Another approach is to place identical liquid cooling plates at the bottom of each cell module. While this achieves cooling for all cell modules, it requires more piping to supply coolant to each plate. Furthermore, the existing layout occupies considerable space on the outside of the cell modules, further compressing the internal space of the battery pack housing. This not only severely impacts the installation of other components but also makes assembly cumbersome.

[0005] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to overcome the problems of the prior art and provide a double-layer cell module heat dissipation mechanism for battery packs. This solves the technical problems of traditional technology, where a liquid cooling plate at the bottom of the box cannot dissipate heat from the upper cell module, while using a multi-layer liquid cooling plate results in the liquid cooling pipeline layout occupying a lot of internal space in the battery pack, thus affecting the installation of other components and making assembly cumbersome.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A dual-layer cell module heat dissipation mechanism for a battery pack includes an upper liquid cooling plate and a lower liquid cooling plate arranged vertically. The ends of the upper and lower liquid cooling plates are aligned, and symmetrical cell module mounting positions are respectively provided on the upper and lower liquid cooling plates. A liquid cooling pipe channel is formed at one end of the upper liquid cooling plate, and an upper liquid inlet and an upper liquid outlet are symmetrically arranged on the upper liquid cooling plate corresponding to both sides of the liquid cooling pipe channel. A lower liquid inlet and an upper liquid outlet are symmetrically arranged on the lower liquid cooling plate corresponding to the liquid cooling pipe channel. The lower liquid outlet has a vertical lower liquid inlet pipe, and the upper liquid inlet has a horizontal upper liquid inlet pipe. The upper liquid inlet pipe and the lower liquid inlet pipe are connected by a three-way liquid inlet connector, and a main liquid inlet pipe is connected to the top interface of the three-way liquid inlet connector. The lower liquid outlet has a vertical lower liquid outlet pipe, and the upper liquid outlet has a horizontal upper liquid outlet pipe. The upper liquid outlet pipe and the lower liquid outlet pipe are connected by a three-way liquid outlet connector, and a main liquid outlet pipe is connected to the top interface of the three-way liquid outlet connector.

[0009] Furthermore, the width of the upper liquid cooling plate is greater than the width of the lower liquid cooling plate, and box connection parts are provided on both sides.

[0010] Furthermore, the housing connection part is provided with a number of screw holes, and the screws are connected to the housing through the screw holes.

[0011] Furthermore, a heat dissipation support is provided on the bottom side of the upper liquid cooling plate.

[0012] Furthermore, there are two heat dissipation supports, symmetrically arranged on the bottom surface of the upper liquid cooling plate, and corresponding to the battery cell module mounting positions on the lower liquid cooling plate.

[0013] Furthermore, the heat dissipation support is provided with several ventilation grooves.

[0014] Furthermore, the heat dissipation support and the upper liquid cooling plate are integrally formed and are both made of aluminum.

[0015] Furthermore, coolant channels are provided in both the upper and lower liquid cooling plates corresponding to the battery cell module mounting positions.

[0016] Furthermore, the width of the liquid cooling pipeline groove is not less than the width of the lower liquid cooling plate.

[0017] This invention provides a dual-layer cell module heat dissipation mechanism for battery packs. It achieves simultaneous cooling of two cell modules through a dual-layer liquid cooling plate structure. A liquid cooling pipe through-channel is provided at one end of the upper liquid cooling plate, greatly facilitating pipe installation without occupying other space within the battery pack, resulting in a cleaner internal layout. This heat dissipation mechanism is simple in structure, easy to assemble, and forms a stable connection with the battery pack housing, while continuously ensuring heat dissipation for the cell modules. Attached Figure Description

[0018] Figure 1 This is a first-view structural schematic diagram of a heat dissipation mechanism for a double-layer cell module in a battery pack according to the present invention.

[0019] Figure 2 This is a second-view structural schematic diagram of a heat dissipation mechanism for a double-layer cell module in a battery pack according to the present invention.

[0020] Figure 3 This is a first-view structural diagram of the upper liquid cooling plate in a double-layer cell module heat dissipation mechanism for a battery pack according to the present invention.

[0021] Figure 4 This is a second-view structural diagram of the upper liquid cooling plate in a double-layer cell module heat dissipation mechanism for a battery pack according to the present invention.

[0022] Figure 5 This is a schematic diagram of the heat dissipation mechanism for a double-layer cell module in a battery pack and the assembled cell module, as described in this utility model.

[0023] Illustration markings:

[0024] 1-Upper liquid cooling plate, 101-Liquid cooling pipe channel, 102-Upper liquid inlet, 103-Upper liquid outlet, 104-Box connection part, 105-Screw hole, 106-Heat dissipation support, 107-Ventilation groove;

[0025] 2-Lower liquid cooling plate, 201-Lower liquid inlet, 202-Lower liquid outlet;

[0026] 3-Cell module mounting position;

[0027] 4-Upper inlet pipe;

[0028] 5-Lower layer inlet pipe;

[0029] 6-Upper layer outlet pipe;

[0030] 7-Lower layer outlet pipe;

[0031] 8-Three-way liquid inlet connector;

[0032] 9-Three-way liquid outlet connector;

[0033] 10-Inlet main pipe;

[0034] 11-Discharge main pipe;

[0035] 12-Cell module. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] like Figure 1 and Figure 2 As shown, this solution provides a dual-layer cell module heat dissipation mechanism for a battery pack, including an upper liquid cooling plate 1 and a lower liquid cooling plate 2 arranged vertically. The two ends of the upper liquid cooling plate 1 and the lower liquid cooling plate 2 are aligned, and symmetrical cell module mounting positions 3 are respectively provided on the upper liquid cooling plate 1 and the lower liquid cooling plate 2.

[0038] One end of the upper liquid cooling plate 1 is provided with a liquid cooling pipe channel 101, and an upper liquid inlet 102 and an upper liquid outlet 103 are symmetrically arranged on the upper liquid cooling plate 1 on both sides of the liquid cooling pipe channel 101; a lower liquid inlet 201 and a lower liquid outlet 202 are symmetrically arranged on the lower liquid cooling plate 2 corresponding to the liquid cooling pipe channel 101.

[0039] A vertical lower inlet pipe 5 is provided on the lower inlet port 201, and a horizontal upper inlet pipe 4 is provided on the upper inlet port 102. The upper inlet pipe 4 and the lower inlet pipe 5 are connected by a three-way inlet connector 8, and an inlet main pipe 10 is connected to the top interface of the three-way inlet connector 8.

[0040] A vertical lower liquid outlet pipe 7 is provided on the lower liquid outlet 202, and a horizontal upper liquid outlet pipe 6 is provided on the upper liquid outlet 103. The upper liquid outlet pipe 6 and the lower liquid outlet pipe 7 are connected by a three-way liquid outlet connector 9, and a liquid outlet main pipe 11 is connected to the top interface of the three-way liquid outlet connector 9.

[0041] Coolant channels are provided in both the upper liquid cooling plate 1 and the lower liquid cooling plate 2 corresponding to the battery cell module mounting position 3. The coolant channels can adopt a common surrounding structure to supply coolant flow and achieve cooling of the upper liquid cooling plate 1 and the lower liquid cooling plate 2. One end of the coolant channel is connected to the liquid inlet of the corresponding liquid cooling plate, and the other end is connected to the liquid outlet.

[0042] The pipeline structure provided in this embodiment for liquid inlet or outlet of the upper and lower liquid cooling plates ensures that the main liquid supply pipeline is always confined within the space corresponding to the liquid cooling pipeline through slot 101, thereby hiding the core pipeline, making the structure simpler, the assembly more convenient, and not occupying too much space outside the battery cell module 12 in the battery pack.

[0043] Working principle:

[0044] By connecting the liquid inlet pipe 10 and the liquid outlet pipe 11 to an external coolant circulation device, liquid can be supplied to the upper liquid cooling plate 1 and the lower liquid cooling plate 2 simultaneously, and the liquid flows outward after passing through the coolant flow channel inside the liquid cooling plate, thereby achieving continuous circulation of liquid supply and cooling the battery cell module mounting position 3.

[0045] It should be noted that in this embodiment, the width of the upper liquid cooling plate 1 is greater than the width of the lower liquid cooling plate 2, and box connecting parts 104 are provided on both sides for fixed connection with the battery pack box, thereby enabling the mechanism to be firmly fixed in the battery pack box.

[0046] Specifically, the housing connection part 104 is provided with a plurality of screw holes 105, and the screws are connected to the housing through the screw holes 105.

[0047] As an optimization of this embodiment, a heat dissipation support 106 is provided on the bottom side of the upper liquid cooling plate 1. The heat dissipation support 106 can act on the top of the battery cell module 12 located on the lower battery cell module mounting position 3, which can not only provide better support for the upper liquid cooling plate so that it can better bear the weight of the upper battery cell module 12, but also help to dissipate heat and allow air to pass between the upper and lower layers.

[0048] As a specific embodiment of this solution, there are two heat dissipation supports 106, symmetrically arranged on the bottom surface of the upper liquid cooling plate 1, corresponding to the battery module mounting position 3 on the lower liquid cooling plate 2. This structure ensures that both heat dissipation supports 106 act on the top of the battery module 12 on the lower battery module mounting position 3, and the two supports provide stable support.

[0049] A number of ventilation grooves 107 are provided on the heat dissipation support 106, which can further promote the gas flow at both ends of the battery cell module, thereby achieving a better heat dissipation and cooling effect.

[0050] In this embodiment, the heat dissipation support 16 and the upper liquid cooling plate 1 are integrally formed and are both made of aluminum. Aluminum has high strength, light weight, corrosion resistance, high temperature resistance, and good thermal conductivity, which can conduct the heat absorbed by its surroundings to the upper liquid cooling plate. The upper liquid cooling plate uses the coolant circulation channel inside its body to cool down the absorbed heat in a timely manner.

[0051] As an optimization of this embodiment, the width of the liquid cooling pipeline through groove 101 is not less than the width of the lower liquid cooling plate 2. This limitation can ensure that the lower liquid inlet pipe 5 and the lower liquid outlet pipe 7 can always be perpendicular to the lower liquid cooling plate 2, which is more conducive to the assembly of the liquid supply pipeline.

[0052] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat dissipation mechanism for a double-layer cell module in a battery pack, characterized in that, It includes an upper liquid cooling plate (1) and a lower liquid cooling plate (2) arranged vertically, with the two ends of the upper liquid cooling plate (1) and the lower liquid cooling plate (2) aligned, and symmetrical battery cell module mounting positions (3) respectively provided on the upper liquid cooling plate (1) and the lower liquid cooling plate (2); One end of the upper liquid cooling plate (1) is provided with a liquid cooling pipe channel (101), and an upper liquid inlet (102) and an upper liquid outlet (103) are symmetrically arranged on the upper liquid cooling plate (1) on both sides of the liquid cooling pipe channel (101); a lower liquid inlet (201) and a lower liquid outlet (202) are symmetrically arranged on the lower liquid cooling plate (2) corresponding to the liquid cooling pipe channel (101); A vertical lower inlet pipe (5) is provided on the lower inlet (201), and a horizontal upper inlet pipe (4) is provided on the upper inlet (102). The upper inlet pipe (4) and the lower inlet pipe (5) are connected by a three-way inlet connector (8), and an inlet main pipe (10) is connected to the top interface of the three-way inlet connector (8). A vertical lower liquid outlet pipe (7) is provided on the lower liquid outlet (202), and a horizontal upper liquid outlet pipe (6) is provided on the upper liquid outlet (103). The upper liquid outlet pipe (6) and the lower liquid outlet pipe (7) are connected by a three-way liquid outlet connector (9), and a liquid outlet main pipe (11) is connected to the top interface of the three-way liquid outlet connector (9).

2. The heat dissipation mechanism for a double-layer cell module in a battery pack according to claim 1, characterized in that, The width of the upper liquid cooling plate (1) is greater than the width of the lower liquid cooling plate (2), and a box connection part (104) is provided on both sides.

3. A heat dissipation mechanism for a double-layer cell module in a battery pack according to claim 2, characterized in that, The housing connection part (104) is provided with a plurality of screw holes (105), and the screws are connected to the housing through the screw holes (105).

4. A heat dissipation mechanism for a double-layer cell module in a battery pack according to claim 1, characterized in that, A heat dissipation support (106) is provided on the bottom side of the upper liquid cooling plate (1).

5. A heat dissipation mechanism for a double-layer cell module in a battery pack according to claim 4, characterized in that, There are two heat dissipation supports (106), which are symmetrically arranged on the bottom surface of the upper liquid cooling plate (1) and correspond to the battery cell module mounting position (3) on the lower liquid cooling plate (2).

6. A heat dissipation mechanism for a double-layer cell module in a battery pack according to claim 4 or 5, characterized in that, The heat dissipation support (106) is provided with several ventilation grooves (107).

7. A heat dissipation mechanism for a double-layer cell module in a battery pack according to claim 6, characterized in that, The heat dissipation support (106) and the upper liquid cooling plate (1) are integrally formed and are both made of aluminum.

8. A heat dissipation mechanism for a double-layer cell module in a battery pack according to claim 1, characterized in that, Cooling fluid channels are provided in both the upper liquid cooling plate (1) and the lower liquid cooling plate (2) corresponding to the battery cell module mounting position (3).

9. A heat dissipation mechanism for a double-layer cell module in a battery pack according to claim 1, characterized in that, The width of the liquid cooling pipeline through groove (101) is not less than the width of the lower liquid cooling plate (2).

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