A multi-layer stacked heat dissipation type aluminum profile housing for battery cells

Abstract

This utility model discloses a multi-layer stacked heat-dissipating aluminum profile housing for battery cells. A single-layer module is formed by L-shaped side plates, a bottom plate, end plates, and a sealing plate. The upper and lower flanges of the side plates are equipped with locking blocks and slots for rapid stacking and positioning. Combined with bolt fastening and reinforcing ribs, the overall rigidity is improved. A cold liquid cavity is integrated and connected to the transverse edge of the side plate and the bottom plate, forming a high-efficiency heat dissipation channel with baffles. Cooling pipes are located within the flange grooves. This design solves the problems of complex structure and low heat dissipation efficiency in traditional multi-layer battery packs, making it suitable for high-energy-density battery systems.

Description

Technical Field

[0001] This utility model relates to the field of battery pack structure technology, specifically to a multi-layer stacked heat dissipation type aluminum profile housing for battery cells. Background Technology

[0002] Electric vehicles primarily utilize electricity for propulsion. To improve range, given the limited energy density of batteries, battery packs often need to be quite large. However, large battery packs affect the overall dimensions of the vehicle. Therefore, current methods typically involve designing multiple independent battery packs and stacking them vertically. An outer frame is used as the main body for stacking to create a larger battery pack, which is then assembled into the vehicle. Existing battery packs require an outer frame, occupying considerable space. Consequently, more batteries cannot be placed within the limited space of the vehicle, limiting the amount of electricity provided. Furthermore, these battery packs involve numerous structural components, leading to high costs. Patent application number 202421520331.3 discloses a multi-layered stacked battery pack and vehicle. While this patent eliminates the need for an outer frame through modular stacking, it suffers from the following drawbacks:

[0003] 1. Poor structural stability, with only vertical bolt connections, making the frame prone to deformation from lateral impacts. When vehicles travel for extended periods or traverse rough terrain, vibrations can occur, and the upper and lower single-layer modules are prone to loosening.

[0004] 2. Although the upper and lower single-layer modules are stacked on each other and cold liquid chambers are set on the bottom plate and side beams of each layer, the water pipe positions are unreasonable, which affects the layout and size of the entire battery pack. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects in the existing technology and provide a multi-layer stacked heat dissipation aluminum profile housing for battery cells.

[0006] To achieve the above objectives, the technical solution of this utility model is to design a multi-layer stacked heat-dissipating aluminum profile housing for battery cells, including a single-layer module and a top plate. The single-layer module includes an L-shaped side plate, a bottom plate, an end plate, and a sealing plate. Two side plates are symmetrically arranged on both sides of the single-layer module. The side edge of the bottom plate is connected to one side of the lateral edge of each of the two side plates. The end plates are symmetrically arranged at both ends of the single-layer module and connected to the lateral and vertical edges of the side plates and one side of the bottom plate. The shape of the sealing plate matches the end cross-sectional shape of the side plates and the bottom plate, and is connected to their ends. The single-layer modules are stacked to form an internal battery cavity. The top plate is located on top of the uppermost single-layer module and is connected to one side of the vertical edge of the side plate. A lower flange is provided at the bottom of the side plate, and an upper flange is provided at the top. The lower and upper flanges are respectively provided with interlocking slots and blocks at both ends. The interlocking of the slots and blocks effectively fixes the upper and lower single-layer modules, thereby achieving stacking.

[0007] Furthermore, the lower flange is provided with a first mounting hole, and the upper flange is provided with a second mounting hole. The first mounting hole and the second mounting hole are connected by a connector. By using the connector, the two single-layer modules can be further reinforced, making them more robust.

[0008] Furthermore, a reinforcing rib is provided between the lower flange and the upper flange of the same side plate. The addition of the reinforcing rib can effectively improve the structural strength of the entire device.

[0009] Preferably, the reinforcing rib has a third mounting hole at both its upper and lower ends that mates with the first and second mounting holes. The first mounting hole is connected to the second and third mounting holes via a connector. The reinforcing rib, connected by the connector, can be removed and installed as needed, thus achieving a balance between overall weight and structural strength.

[0010] Preferably, the connecting element is a bolt and a nut, which cooperate with each other. The connecting element is preferably a bolt and a nut, but it can also be a rivet connection or a pin connection, etc.

[0011] Furthermore, the side plate has horizontal ribs inside its vertical edge and a first cold liquid chamber inside its horizontal edge. An inlet and an outlet are respectively opened on one side of the first cold liquid chamber. A second cold liquid chamber is provided inside the bottom plate, and the second cold liquid chamber communicates with the first cold liquid chamber. The coolant can be a dedicated coolant for battery cooling or water.

[0012] Furthermore, the lower and upper flanges on the side plate are respectively provided with a first pipe groove and a second pipe groove near the port. An inlet pipe and an outlet pipe are respectively installed in the first and second pipe grooves. The inlet pipe is connected to the inlet port, and the outlet pipe is connected to the outlet port. The pipes are concealed within the flange grooves, effectively saving space and preventing damage from external pressure.

[0013] Preferably, the first and / or second coolant chambers are divided into multiple adjacent sub-cavities that are interconnected at their ends by baffles, with adjacent sub-cavities connected at one end. The advantage of subdividing the sub-cavities is that it increases the flow path of the coolant, thereby further improving cooling efficiency.

[0014] Optionally, the top plate is also provided with a slot or block that matches the slot or block of the flange on the side plate.

[0015] The advantages and beneficial effects of this utility model are as follows:

[0016] 1. The plug-in design of the card block and card slot enables tool-free pre-positioning, and with bolt fastening, the overall strength is greatly improved;

[0017] 2. The cold liquid chamber is directly embedded in the side plate and the bottom plate. The multi-chamber and baffle design extends the fluid travel. The cold liquid chambers between the upper and lower single-layer modules are connected in parallel, resulting in better heat dissipation.

[0018] 3. The integrated aluminum profile cooling structure replaces independent heat dissipation components, and the cooling pipes are hidden in the flange groove, saving space. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the aluminum profile housing structure of the battery cell of this utility model;

[0020] Figure 2 This is a front view of two single-layer modules of the aluminum profile housing for the battery cell of this utility model;

[0021] Figure 3 This is a detailed drawing of the connection point between two single-layer modules of the aluminum profile housing for the battery cell of this utility model;

[0022] Figure 4 This is a schematic diagram of the single-layer module structure of the aluminum profile housing for the battery cell of this utility model;

[0023] Figure 5 This is a front view of a single-layer module of the aluminum profile housing for the battery cell of this utility model;

[0024] Figure 6 This is a cross-sectional view of the aluminum profile side panel of this utility model;

[0025] Figure 7 This is a schematic diagram of the liquid cooling solution of this utility model.

[0026] In the diagram: 1. Single-layer module; 11. Side plate; 111. Horizontal edge; 112. Vertical edge; 113. First cold liquid chamber; 114. Liquid inlet; 115. Liquid outlet; 116. Horizontal rib; 121. Lower flange; 122. Upper flange; 123. Slot; 124. Block; 125. First mounting hole; 126. Second mounting hole; 13. Base plate; 131. Second cold liquid chamber; 14. End plate; 15. Sealing plate; 2. Top plate; 3. Connector; 31. Bolt; 32. Nut; 4. Reinforcing rib; 41. Third mounting hole; 51. First pipe groove; 511. Liquid inlet pipe; 52. Second pipe groove; 521. Liquid outlet pipe; 6. Baffle; 61. Sub-cavity. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0028] according to Figures 1-5As shown, this utility model is a multi-layer stacked heat dissipation type aluminum profile housing for battery cells, including a single-layer module 1 and a top plate 2. The single-layer module 1 includes an L-shaped side plate 11, a bottom plate 13, an end plate 14, and a sealing plate 15. There are two side plates 11, which are symmetrically arranged on both sides of the single-layer module 1. The side of the bottom plate 13 is connected to one side of the horizontal edge 111 of the two side plates 11 respectively. The end plates 14 are symmetrically arranged at both ends of the single-layer module 1 and are connected to the horizontal edge 111 and vertical edge 112 of the side plates 11 and one side of the bottom plate 13. The shape of the sealing plate 15 matches the end cross-sectional shape of the side plate 11 and the bottom plate 13, and is connected to their ends. The single-layer modules 1 are stacked to form an internal battery cavity. The top plate 2 is located on the top of the uppermost single-layer module 1 and is connected to one side of the vertical edge 112 of the side plate 11. The lower part of the side plate 11 is provided with a lower flange 121, and the upper part of the side plate 11 is provided with an upper flange 122. The lower flange 121 and the upper flange 122 are respectively provided with a slot 123 and a block 124 that can cooperate with each other.

[0029] Side plate 11, bottom plate 13, end plate 14, sealing plate 15, and top plate 2 can be made of extruded aluminum profiles, with a simple manufacturing process and low cost. The bottom plate 13 is connected to the side plate 11, the sealing plate 15 is connected to the side plate 11 and the bottom plate 13, and the plate 14 is connected to the transverse edge 111 and vertical edge 112 of the side plate 11 and one side of the bottom plate 13. The preferred connection method here is nitrogen-protected argon arc welding or friction stir welding to ensure no leakage at the flow channel joint surface. After connection, the locking blocks 124 on the lower flange 121 and upper flange 122 of the two single-layer modules 1 are slid into the locking groove 123, thereby connecting the two single-layer modules 1. The locking groove 123 and locking blocks 124 are preferably trapezoidal. Multiple sets of single-layer modules 1 can be connected repeatedly. Finally, the top plate 2 is installed on top of the uppermost single-layer module 1. Studs and nuts can be used for connection here, or adhesives can be used.

[0030] In some embodiments of this application, the lower flange 121 is provided with a first mounting hole 125, and the upper flange 122 is provided with a second mounting hole 126. The first mounting hole 125 and the second mounting hole 126 are connected by a connector 3. The first mounting hole 125 and the second mounting hole 126 can be through holes or threaded holes. Using the connector 3 to connect the upper and lower parts can better reinforce the entire shell structure.

[0031] Preferably, a sealing gasket is provided at the connection between the upper flange 122 and the lower flange 121 at the connection of the two single-layer modules 1, which can effectively play a sealing role.

[0032] In some embodiments of this application, a reinforcing rib 4 is provided between the lower flange 121 and the upper flange 122 of the same side plate 11.

[0033] In some embodiments of this application, the reinforcing rib 4 is provided with a third mounting hole 41 at both its upper and lower ends, which mates with the first mounting hole 125 and the second mounting hole 126. The first mounting hole 125, the second mounting hole 126, and the third mounting hole 41 are connected by a connector 3. The reinforcing rib 4 can be directly welded to the lower flange 121 and the upper flange 122 of the side plate 11, or it can be fixed by a movable connection, such as bolts and nuts, or studs or other methods.

[0034] In some embodiments of this application, the connector 3 is a bolt 31 and a nut 32, which cooperate with each other.

[0035] In some embodiments of this application, a horizontal rib 116 is provided in the vertical edge 112 of the side plate 11, and a first cold liquid cavity 113 is provided in the horizontal edge 111. An inlet 114 and an outlet 115 are respectively opened on one side of the first cold liquid cavity 113 of the side plate 11. A second cold liquid cavity 131 is provided in the bottom plate 13, and the second cold liquid cavity 131 is connected to the first cold liquid cavity 113.

[0036] Before welding the base plate 13 to one side of the transverse edge 111 of the two side plates 11, the contact surface should be connected to the first cold liquid chamber 113 using a machine. Then, a sealing plate 15 is used to seal the openings at both ends, thus forming a coolant channel with only an inlet 114 and an outlet 115, and the second cold liquid chamber 131 communicating with the first cold liquid chamber 113. The sealing plate 15 preferably seals the openings by welding, but can also achieve a seal by interference fit with a rubber stopper or by bonding a rubber stopper. In use, coolant is introduced into the inlet 114. The coolant enters the first cold liquid chamber 113 of the first side plate 11 through the inlet 114, then flows into the second cold liquid chamber 131 of the bottom plate 13, and then flows into the first cold liquid chamber 113 of the second side plate 11, and is discharged from the outlet 115. During this process, there can be multiple first cold liquid chambers 113 and second cold liquid chambers 131, and the connected cold liquid chambers can be connected. When the coolant flows through the first cold liquid chamber 113 and the second cold liquid chamber 131, it will carry heat away from the shell, thereby achieving the purpose of heat dissipation and cooling.

[0037] according to Figure 6 As shown, in some embodiments of this application, the lower flange 121 and the upper flange 122 on the side plate 11 are respectively provided with a first pipe groove 51 and a second pipe groove 52 near the port. The first pipe groove 51 and the second pipe groove 52 are respectively provided with an inlet pipe 511 and an outlet pipe 521. The inlet pipe 511 is connected to the inlet port 114, and the outlet pipe 521 is connected to the outlet port 115.

[0038] The lower flange 121 and upper flange 122 on the side plate 11 are respectively provided with a first pipe groove 51 and a second pipe groove 52 near the port. Since the groove is at the end, it can be directly processed by machine, and the process is not complicated. When opening the groove, the influence of the lower flange 121 and upper flange 122 on the pipe position after they come into contact when they are fitted together should be considered. In addition, the position of the liquid inlet 114 and liquid outlet 115 on the first cold liquid chamber 113 also needs to be considered so as to select the optimal route. Preferably, the first pipe groove 51 and the second pipe groove 52 are T-shaped, and a T-shaped pipe is set at the T-shaped bend to connect the pipes between the upper and lower single-layer modules 1. When the liquid inlet pipe 511 and the liquid outlet pipe 521 are connected to the liquid inlet 114 and the liquid outlet 115, welding or professional adhesive is preferred.

[0039] according to Figure 7 As shown in some embodiments of this application, the first cold liquid chamber 113 and / or the second cold liquid chamber 131 are divided into multiple adjacent sub-cavities 61 that are interconnected at their ends by baffles 6. The adjacent sub-cavities 61 are connected at one end. The connection of the adjacent sub-cavities 61 at one end can be achieved simply by using a tool to remove a portion of the baffle 6 near the end between the side plate 11 and / or the bottom plate 13. Within the same cold liquid chamber, the notches on the adjacent baffles 6 are staggered at both ends of the chamber, so that the coolant forms an S-shaped flow path and increases the flow path of the coolant, thereby further improving the cooling efficiency.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-layer stacked heat dissipation type aluminum profile housing for battery cells, comprising a single-layer module (1) and a top plate (2), wherein the single-layer module (1) comprises an L-shaped side plate (11), a bottom plate (13), an end plate (14), and a sealing plate (15), wherein there are two side plates (11), which are symmetrically arranged on both sides of the single-layer module (1), the side edge of the bottom plate (13) is connected to one side of the transverse edge (111) of the two side plates (11), and the end plate (14) is symmetrically arranged at both ends of the single-layer module (1) and connected to the side plate (15). The transverse edge (111) and vertical edge (112) of the plate (11) are connected to one side of the bottom plate (13). The shape of the sealing plate (15) matches the end cross-sectional shape of the side plate (11) and the bottom plate (13), and is connected to the ends of the side plate (11) and the bottom plate (13). The single-layer modules (1) are stacked to form an internal battery cavity. The top plate (2) is located on top of the uppermost single-layer module (1) and is connected to one side of the vertical edge (112) of the side plate (11). The side plate (11) is provided with a lower flange (121) at the lower part and an upper flange (122) at the upper part. The lower flange (121) and the upper flange (122) are respectively provided with matching slots (123) and blocks (124) at both ends.

2. The multi-layer stacked heat dissipation type aluminum profile housing for battery cells according to claim 1, characterized in that, The lower flange (121) is provided with a first mounting hole (125), and the upper flange (122) is provided with a second mounting hole (126). The first mounting hole (125) and the second mounting hole (126) are connected by a connector (3).

3. The multi-layer stacked heat dissipation type aluminum profile housing for battery cells according to claim 2, characterized in that, A reinforcing rib (4) is provided between the lower flange (121) and the upper flange (122). The reinforcing rib (4) is located between the lower flange (121) and the upper flange (122) on the same side of the single-layer module (1) and is connected to the outside of the vertical edge (112) of the side plate (11).

4. The multi-layer stacked heat dissipation type aluminum profile housing for battery cells according to claim 3, characterized in that, The reinforcing rib (4) has a third mounting hole (41) at both ends that cooperates with the first mounting hole (125) and the second mounting hole (126). The first mounting hole (125) is connected to the second mounting hole (126) and the third mounting hole (41) by a connector (3).

5. The multi-layer stacked heat dissipation type aluminum profile housing for battery cells according to claim 2, characterized in that, The connector (3) consists of a bolt (31) and a nut (32), which are mutually engaged.

6. The multi-layer stacked heat dissipation type aluminum profile housing for battery cells according to claim 1, characterized in that, A horizontal rib (116) is provided in the vertical side (112) of the side plate (11), and a first cold liquid cavity (113) is provided in the horizontal side (111). The first cold liquid cavity (113) of the two side plates (11) on both sides of the single-layer module (1) is provided with an inlet (114) and an outlet (115) respectively. A second cold liquid cavity (131) is provided in the bottom plate (13), and the second cold liquid cavity (131) is connected to the first cold liquid cavity (113).

7. The multi-layer stacked heat dissipation type aluminum profile housing for battery cells according to claim 6, characterized in that, The lower flange (121) and upper flange (122) on the two side plates (11) on both sides of the single-layer module (1) are respectively provided with a first pipe groove (51) and a second pipe groove (52) near the port. The first pipe groove (51) and the second pipe groove (52) are respectively provided with an inlet pipe (511) and an outlet pipe (521). The inlet pipe (511) is connected to the inlet port (114), and the outlet pipe (521) is connected to the outlet port (115).

8. The multi-layer stacked heat dissipation type aluminum profile housing for battery cells according to claim 6, characterized in that, The first cold liquid chamber (113) and / or the second cold liquid chamber (131) are divided into multiple adjacent sub-cavities (61) that are interconnected at their ends by a baffle (6), and the adjacent sub-cavities (61) are connected at one end.

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