Short-process new energy battery liquid cooling plate and battery tray

Abstract

The utility model relates to a short-flow new energy battery liquid cooling plate and battery tray, comprising: a cooling assembly and a confluence assembly, the cooling assembly comprises a first liquid cooling plate and a second liquid cooling plate, the first liquid cooling plate and the second liquid cooling plate are arranged in parallel along the axial direction of the length direction; a plurality of first flow channels and a plurality of second flow channels are respectively arranged in the first liquid cooling plate and the second liquid cooling plate along the length axis direction; the converging assembly comprises a shunting row, a converging row and a backflow row, the shunting row and the converging row are arranged at one end of the first flow channel and one end of the second flow channel side by side, and the backflow row is arranged at the other end of the first flow channel and the other end of the second flow channel; the reflux row is communicated with the first flow channel and the second flow channel; a liquid inlet is formed in one end of the shunting row, and a liquid outlet is formed in one end of the busbar. The heat exchange conditions of all the independent cooling runners are the same, so that the consistent cooling effect on the battery cells can be ensured, the problem of overlarge temperature difference between the battery cells caused by non-uniform temperature of cooling liquid is avoided, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy battery cooling, in particular to a short-process new energy battery liquid cooling plate and a battery tray. Background Art

[0002] During the charging and discharging process of lithium batteries, heat is generated, causing the temperature of the battery cells to rise. A liquid cooling plate is required to cool the lithium batteries. At present, in order to improve the uniformity of flow and extend the residence time of the coolant, the liquid cooling plate is a single-layer structure, and the flow channels inside the liquid cooling plate are usually designed as serpentine and other baffle channels.

[0003] For example, the technical solutions disclosed in Chinese patents with publication numbers CN218568995U and CN212257623U. The problem caused by such long-process coolant channels is that the coolant absorbs the heat released by the battery cells during the flow process and heats up, resulting in uneven cooling effect on the battery cells and easy occurrence of inconsistent temperature distribution of the battery cells. Specifically, the temperature of the coolant near the coolant inlet is relatively low, and the cooling effect on the battery cells is better, while the temperature of the coolant near the coolant outlet is relatively high, and the cooling effect on the battery cells is not ideal. This causes a large temperature difference between the battery cells in the battery pack and uneven temperature distribution, affecting the consistency of the working performance of the battery cells. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the present utility model is to overcome the defect that the battery liquid cooling plate in the prior art cannot achieve uniform temperature reduction, resulting in poor cooling effect.

[0005] To solve the above technical problem, the present utility model provides a short-process new energy battery liquid cooling plate, including:

[0006] A cooling component, the cooling component includes a first liquid cooling plate and a second liquid cooling plate, and the first liquid cooling plate and the second liquid cooling plate are arranged in parallel along the axial direction of the length; a plurality of first flow channels and a plurality of second flow channels are respectively arranged inside the first liquid cooling plate and the second liquid cooling plate along the length axis direction;

[0007] A confluence component, the confluence component includes a shunt row, a confluence row and a return row, the shunt row and the confluence row are arranged side by side at one end of the first flow channel and the second flow channel, and the return row is arranged at the other end of the first flow channel and the second flow channel; the return row connects the first flow channel and the second flow channel; a liquid inlet is arranged at one end of the shunt row, and a liquid discharge port is arranged at one end of the confluence row.

[0008] In an embodiment of the present utility model, the cooling component further includes a heat insulation plate, and the heat insulation plate is arranged between the first liquid cooling plate and the second liquid cooling plate.

[0009] In one embodiment of the present utility model, the shunt busbar and the busbar are arranged on both sides of the heat insulation plate, and the return busbar is provided with a groove, and the heat insulation plate is clamped in the groove.

[0010] In one embodiment of the present utility model, the material of the heat insulation plate is a fiberglass board or an asbestos board.

[0011] In one embodiment of the present utility model, the return busbar is axially provided with a plurality of return channels. One end of the return channel close to the first flow channel is the water inlet, and one end of the return channel close to the second flow channel is the water outlet.

[0012] In one embodiment of the present utility model, the number of the return channels, the number of the first flow channels, and the number of the second flow channels are all equal.

[0013] In one embodiment of the present utility model, the shunt busbar is axially provided with a plurality of shunt ports. The plurality of shunt ports respectively correspond to the first flow channels, and the plurality of shunt ports are interconnected and communicated with the liquid inlet.

[0014] In one embodiment of the present utility model, the busbar is axially provided with a plurality of busbar ports. The plurality of busbar ports respectively correspond to the second flow channels, and the plurality of busbar ports are interconnected and communicated with the liquid discharge port.

[0015] A battery tray includes the short-process new energy battery liquid cooling plate described above.

[0016] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0017] For the short-process new energy battery liquid cooling plate and the battery tray of the present utility model, the heat exchange conditions of all independent cooling channels are the same, which can ensure a consistent cooling effect on the battery cells, avoid the problem of excessive temperature difference between the battery cells caused by uneven coolant temperature, effectively improve the consistency of the working environment of the battery cells, and extend the service life of the battery pack. Description of the Drawings

[0018] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model and in conjunction with the drawings, where

[0019] Figure 1 is the overall structural schematic diagram of the present utility model;

[0020] Figure 2 is Figure 1 the structural schematic diagram of the cooling assembly in

[0021] Figure 3 is Figure 1Schematic structural diagram of the shunt bar and the bus bar in the middle bus bar assembly;

[0022] Figure 4 For Figure 1 Schematic structural diagram of the bus bar in the middle bus bar assembly;

[0023] Explanation of the reference numerals in the drawings of the specification: 1. Cooling assembly; 2. Bus bar assembly; 11. First liquid cooling plate; 12. Second liquid cooling plate; 13. Heat insulation plate; 21. Shunt bar; 22. Bus bar; 23. Return bar; 24. Liquid inlet; 25. Liquid outlet; 111. First flow channel; 121. Second flow channel; 211. Shunt port; 221. Confluence port; 231. Water inlet; 232. Water outlet; 233. Groove. Detailed implementation manners

[0024] The present utility model will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the specific embodiments cited are not intended to limit the present utility model.

[0025] Embodiment 1

[0026] Referring to Figures 1-4 as shown, the present utility model discloses a short - process new - energy battery liquid cooling plate, including:

[0027] A cooling assembly 1, the cooling assembly 1 includes a first liquid cooling plate 11 and a second liquid cooling plate 12, and the first liquid cooling plate 11 and the second liquid cooling plate 12 are arranged in parallel along the axial direction of the length; a plurality of first flow channels 111 and a plurality of second flow channels 121 are respectively arranged inside the first liquid cooling plate 11 and the second liquid cooling plate along the length axis direction;

[0028] A bus bar assembly 2, the bus bar assembly 2 includes a shunt bar 21, a bus bar 22 and a return bar 23, the shunt bar 21 and the bus bar 22 are arranged side by side at one end of the first flow channel 111 and the second flow channel 121, and the return bar 23 is arranged at the other end of the first flow channel 111 and the second flow channel 121; the return bar 23 connects the first flow channel 111 and the second flow channel 121; a liquid inlet 24 is arranged at one end of the shunt bar 21, and a liquid outlet 25 is arranged at one end of the bus bar 22.

[0029] It can be seen that in the present utility model, a double-layer liquid cooling plate structure is adopted, with the first liquid cooling plate 11 and the second liquid cooling plate 12 arranged one above the other. Multiple first flow channels 111 are provided inside the first liquid cooling plate 11, and multiple second flow channels 121 are provided inside the second liquid cooling plate 12. The first flow channels 111 and the second flow channels 121 are respectively arranged along the axial directions of the first liquid cooling plate 11 and the second liquid cooling plate 12, and are both direct current channels. Secondly, the first flow channels 111 and the second flow channels 121 are connected by a return manifold 23. After the coolant enters the first flow channels 111, it flows into the second channels through the return manifold 23. Finally, one ends of the first liquid cooling plate 11 and the second liquid cooling plate 12 are respectively connected to a distribution manifold 21 and a collection manifold 22. An inlet port 24 is provided on the distribution manifold 21, and a drain port 25 is provided on the collection manifold 22. During actual use, one side of the first liquid cooling plate 11 is in direct contact with the battery cells to be cooled. After the coolant is input from the inlet port 24 to the distribution manifold 21, it is distributed to multiple first flow channels 111. The coolant in the first flow channels 111 exchanges heat with the battery cells, then enters the second flow channels 121 through the return manifold 23, and finally enters the collection manifold 22 and is discharged from the drain port 25, forming an entire cooling circuit.

[0030] The present utility model adopts an upper and lower double-layer liquid cooling plate design. The channels inside the upper first liquid cooling plate 11 are short straight channels. After the coolant enters the distribution manifold 21, it is evenly distributed into several strands and enters the independent upper-layer liquid cooling plate flow channels. After flowing through the upper first liquid cooling plate 11 in sequence to exchange heat with the battery cells, it turns back through the return manifold 23 and enters the lower second liquid cooling plate 12. After converging through the collection manifold 22, it flows out from the drain port 25. In the present utility model, the heat exchange conditions of all independent cooling flow channels are the same, which can ensure a consistent cooling effect on the battery cells, avoid the problem of excessive temperature difference between battery cells caused by uneven coolant temperature, effectively improve the consistency of the working environment of the battery cells, and extend the service life of the battery pack.

[0031] Furthermore, the cooling assembly 1 further includes a heat insulation plate 13, and the heat insulation plate 13 is arranged between the first liquid cooling plate 11 and the second liquid cooling plate 12.

[0032] Specifically, since the present utility model adopts a structure in which two sets of cooling plates are arranged side by side, during actual use, after the coolant passes through the first cooling plate, heat is exchanged into the coolant. After entering the second cooling plate, the temperature of the coolant in the second cooling plate rises and will be transferred to the first cooling plate, resulting in an increase in the temperature of the coolant in the first cooling plate. As a preferred solution of the present utility model, a heat insulation plate 13 is arranged between the first liquid cooling plate 11 and the second liquid cooling plate 12 to isolate the heat between the two sets of cooling plates above and below, and prevent the bottom second cooling plate from transferring heat to the top first cooling plate, thereby affecting the heat dissipation effect on the battery cells.

[0033] Furthermore, the shunt busbar 21 and the busbar 22 are arranged on both sides of the heat insulation plate 13. A groove 233 is provided on the return busbar 23, and the heat insulation plate 13 is clamped in the groove 233.

[0034] Specifically, the entire heat insulation plate 13 is wrapped between the shunt busbar 21, the busbar 22, the first cooling plate, the second cooling plate and the return busbar 23, which can ensure the degree of fit between the shunt busbar 21, the busbar 22 and the return busbar 23 and the heat insulation plate 13, and ensure the overall aesthetic degree.

[0035] Furthermore, the material of the heat insulation plate 13 is a fiberglass board or an asbestos board.

[0036] Specifically, as a preferred solution of the present utility model, the selection of the material of the heat insulation plate 13 needs to meet a low thermal conductivity, and the thermal conductivity needs to be less than 0.1 W / (m / K). It can effectively isolate the heat transfer and prevent the heat of the second cooling plate at the bottom from being transferred to the first cooling plate at the top.

[0037] Furthermore, the return busbar 23 is axially provided with a plurality of return channels. One end of the return channel close to the first flow channel 111 is the water inlet 231, and one end of the return channel close to the second flow channel 121 is the water outlet 232.

[0038] Specifically, the cross-section of the entire return busbar 23 is a U-shaped structure, and the internal return channels are U-shaped. Both ends of each return channel are respectively communicated with the first flow channel 111 and the second flow channel 121; the coolant enters the water inlet 231 of the return channel from the first flow channel 111, and then flows into the second flow channel 121 from the water outlet 232 of the return channel.

[0039] Furthermore, the number of the return channels, the number of the first flow channels 111 and the number of the second flow channels 121 are all equal.

[0040] Furthermore, the shunt busbar 21 is axially provided with a plurality of shunt ports 211. The plurality of shunt ports 211 respectively correspond to the first flow channels 111. The plurality of shunt ports 211 are communicated with each other and are communicated with the liquid inlet 24. The busbar 22 is axially provided with a plurality of busbar ports 221. The plurality of busbar ports 221 respectively correspond to the second flow channels 121. The plurality of busbar ports 221 are communicated with each other and are communicated with the liquid discharge port 25.

[0041] Specifically, the entire coolant circuit is as follows: After the coolant is input into the shunt row 21 from the liquid inlet 24, it flows into a plurality of first channels through a plurality of shunt ports 211, then enters the return channel and the second channel, and finally enters the confluence row 22 from a plurality of confluence ports 221 and flows out from the liquid discharge port 25. After the entire liquid cooling device is filled with coolant, the entire cooling circuit operates stably. One side of the first cooling plate is directly attached to the battery cell, and heat exchange occurs at the part in contact with the battery cell to cool the battery cell.

[0042] Embodiment 2

[0043] A battery tray includes the short-process new energy battery liquid cooling plate described in Embodiment 1.

[0044] In summary, the present utility model introduces a short-process new energy battery liquid cooling plate and a battery tray. The upper and lower double-layer liquid cooling plate design is adopted. The inner channel of the upper first liquid cooling plate 11 is a short straight channel. After the coolant enters the shunt row 21, it is evenly distributed into several strands and enters the independent upper-layer liquid cooling plate flow channels. After flowing through the upper first liquid cooling plate 11 in sequence to exchange heat with the battery cell, it turns back through the return row 23 and enters the lower second liquid cooling plate 12. After being confluenced by the confluence row 22, it flows out from the liquid discharge port 25. In the present utility model, the heat exchange conditions of all independent cooling channels are the same, which can ensure a consistent cooling effect on the battery cell, avoid the problem of excessive temperature difference between battery cells caused by uneven coolant temperature, effectively improve the consistency of the battery cell working environment, and extend the service life of the battery pack.

[0045] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. A short-process new energy battery liquid cooling plate, characterized in that: include: A cooling assembly, the cooling assembly comprising a first liquid cooling plate and a second liquid cooling plate, the first liquid cooling plate and the second liquid cooling plate being arranged in parallel along the axial direction of the length; a plurality of first flow channels and a plurality of second flow channels are respectively arranged inside the first liquid cooling plate and the second liquid cooling plate along the axial direction of the length; A bus assembly, the bus assembly comprising a shunt bar, a bus bar and a return bar, the shunt bar and the bus bar are arranged side by side at one end of the first flow channel and the second flow channel, the return bar is arranged at the other end of the first flow channel and the second flow channel; the return bar connects the first flow channel and the second flow channel; a liquid inlet is arranged at one end of the shunt bar, and a liquid discharge port is arranged at one end of the bus bar.

2. The short-process new energy battery liquid cooling plate according to claim 1 is characterized in that: The cooling assembly further includes a heat insulation plate disposed between the first liquid cooling plate and the second liquid cooling plate.

3. The short-process new energy battery liquid cooling plate according to claim 2 is characterized in that: The shunt bar and the bus bar are arranged on both sides of the heat insulation board, the return bar is provided with a groove, and the heat insulation board is clamped in the groove.

4. The short-process new energy battery liquid cooling plate according to claim 2 is characterized in that: The material of the heat insulation board is glass fiber board or asbestos board.

5. The short-process new energy battery liquid cooling plate according to claim 1 is characterized in that: The reflux row is provided with a plurality of reflux channels along the axial direction, one end of the reflux channel close to the first flow channel is a water inlet, and one end of the reflux channel close to the second flow channel is a water outlet.

6. The short-process new energy battery liquid cooling plate according to claim 5 is characterized in that: The number of the reflux channels, the number of the first flow channels, and the number of the second flow channels are all equal.

7. The short-process new energy battery liquid cooling plate according to claim 1 is characterized in that: The flow diverter row is provided with a plurality of flow diverter ports along the axial direction, the plurality of flow diverter ports respectively correspond to the first flow channel, and the plurality of flow diverter ports are connected to each other and to the liquid inlet.

8. The short-process new energy battery liquid cooling plate according to claim 1 is characterized in that: The bus bar is provided with a plurality of confluence ports along the axial direction, the plurality of confluence ports respectively correspond to the second flow channels, and the plurality of confluence ports are connected to each other and to the liquid discharge port.

9. A battery tray, characterized in that: It comprises a short-process new energy battery liquid cooling plate as described in any one of claims 1-8.

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