A large-capacity cell cold plate and a battery pack

Abstract

The utility model provides a kind of large-capacity battery cell cold plate and battery pack, it is related to battery cell heat dissipation technical field, large-capacity battery cell cold plate includes bottom plate, cover plate and multiple partition plates;Bottom plate is equipped with recess and multiple partitions, multiple partitions are parallelly arranged in recess, to be separated as S shape flow channel with recess, partition is linear form;Cover plate is sealingly connected with bottom plate;Multiple partition plates are fixedly connected to bottom plate, and communication hole is equally spacedly penetrated along the surface parallel to the length direction of bottom plate of partition plate. Through multiple partition plates, it is laid in S shape flow channel along medium flow direction, and the section of partition plate along the length direction perpendicular to bottom plate is wavy, the contact surface area is increased inside flow channel, the heat dissipation capacity is improved, the communication hole is equally spacedly penetrated along the surface parallel to the length direction of bottom plate of partition plate, the fluidity of medium on both sides of partition plate is improved, so that medium flows more evenly, and the heat uniformity is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery cell heat dissipation technology, and in particular to a large-capacity battery cell cooling plate and battery pack. Background Technology

[0002] A cold plate is a structural component in a power battery system that transfers excess heat generated by the battery or module through contact with it, with the heat ultimately carried away by coolant flowing through its internal channels. Conventional cold plates typically have narrow S-shaped channels, resulting in limited heat dissipation capacity.

[0003] For large-capacity cells such as 472AH and 587AH cells, due to their higher energy density and greater heat generation, conventional cold plates cannot effectively dissipate heat. When using conventional cold plates, the maximum temperature of the battery pack exceeds 40°C, which has a significant impact on the cycle life of the cells and cannot meet customer needs. Utility Model Content

[0004] In view of this, the present invention proposes a large-capacity cell cold plate and battery pack to solve the technical problem mentioned in the background art that conventional cold plates with S-shaped narrow flow channels cannot effectively dissipate heat from large-capacity cells, which has a great impact on the cycle life of the cells.

[0005] The technical solution of this utility model is implemented as follows: In a first aspect, this utility model provides a high-capacity battery cell cold plate, comprising a base plate, a cover plate, and multiple partition plates, wherein: The base plate is provided with a groove and multiple partitions, the multiple partitions being arranged in parallel in the groove to divide the groove into S-shaped flow channels, and the partitions being straight. The cover plate is sealed to the base plate; Multiple partition plates are fixedly connected to the base plate and laid flat in the S-shaped flow channel along the direction of medium flow. The cross-section of the partition plate perpendicular to the length direction of the base plate is wavy, and the partition plate is provided with connecting holes at equal intervals along the surface parallel to the length direction of the base plate.

[0006] Based on the above technical solutions, preferably, the wavy shapes of two adjacent partition plates are staggered.

[0007] Based on the above technical solutions, preferably, the S-shaped flow channel includes multiple direct flow channels and connecting flow channels. The multiple direct flow channels are arranged along the length direction of the base plate and are parallel to each other. The connecting flow channels connect two adjacent direct flow channels, and the two connecting flow channels connected by the same direct flow channel are located at both ends of the length direction of the direct flow channel.

[0008] Based on the above technical solutions, preferably, four DC channels are provided, and the ratio of the width of the DC channel to the width of the partition strip is 3 to 10.

[0009] Based on the above technical solutions, preferably, the connecting hole of the partition plate located at the connecting flow channel connects two adjacent direct current channels.

[0010] Based on the above technical solutions, preferably, there is a gap between the two sides of the partition plate located at the connecting channel and the two ends of the connecting channel in the width direction.

[0011] Based on the above technical solutions, preferably, the thickness of the partition plate is the same as the depth of the groove.

[0012] Secondly, this utility model also proposes a battery pack, including battery cells and a high-capacity battery cell cooling plate as described in the first aspect, wherein the high-capacity battery cell cooling plate is used to dissipate heat from the battery cells.

[0013] The large-capacity battery cell cold plate of this invention has the following advantages over the prior art: (1) Multiple partition plates are laid flat in the S-shaped flow channel along the direction of medium flow. The cross section of the partition plate along the length direction perpendicular to the bottom plate is wavy, which increases the contact surface area inside the flow channel and improves the heat dissipation capacity. The partition plate is provided with connecting holes at equal intervals along the surface parallel to the length direction of the bottom plate, which improves the fluidity of the medium on both sides of the partition plate, making the medium flow more uniform and improving the heat dissipation performance. (2) By interleaving the wavy shape of two adjacent partition plates, the turbulence can be enhanced, the overall resistance can be reduced, the fluid mixing near the boundary layer can be enhanced, the flow rate of the medium can be increased, and thus the cooling efficiency can be improved. (3) The S-shaped flow channel includes multiple direct flow channels and connecting flow channels. The multiple direct flow channels are arranged along the length direction of the bottom plate and are parallel to each other. The connecting flow channel connects two adjacent direct flow channels. The two connecting flow channels connected by the same direct flow channel are located at both ends of the length direction of the direct flow channel, forming an S-shaped flow channel with the ends connected, which facilitates the arrangement of the partition plate. (4) Four DC channels are provided, and the ratio of the width of the DC channel to the width of the partition is 3 to 10. The DC channels are widened to increase the filling area of ​​the partition plate and further reduce the overall resistance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the large-capacity battery cell cold plate (with the cover plate removed) of this utility model; Figure 2 This is a perspective view of the high-capacity battery cell cold plate of this utility model; Figure 3 This is an exploded view of the high-capacity battery cell cold plate of this utility model; Figure 4 This utility model Figure 1 A magnified view of part A in the middle; Figure 5 This utility model Figure 1 Enlarged view of part B in the middle; Figure 6 This is a schematic diagram of the structure of the base plate of this utility model; Figure 7 This is a left view of the partition plate of this utility model; Figure 8 This is a front view of the partition plate of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1-base plate, 2-cover plate, 3-partition plate; 100 - S-shaped flow channel, 110 - direct flow channel, 120 - interconnected flow channel; 11-Groove, 12-Separator; 21 - Inlet column, 22 - Outlet column; 31 - Connecting hole. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0018] Reference Figures 1-8 As shown, in a first aspect embodiment of the present invention, a high-capacity battery cell cold plate is provided, comprising a base plate 1, a cover plate 2, and multiple partition plates 3, wherein: The base plate 1 is provided with a groove 11 and a plurality of partition strips 12. The plurality of partition strips 12 are arranged in parallel in the groove 11 to divide the groove 11 into an S-shaped flow channel 100. The partition strips 12 are straight. The cover plate 2 is sealed to the bottom plate 1; the cover plate 2 and the bottom plate 1 are connected by bolts to achieve a sealed connection. The cover plate 2 is provided with an inlet column 21 and an outlet column 22. The inlet column 21 is connected to the first end of the S-shaped flow channel 100, and the outlet column 22 is connected to the end of the S-shaped flow channel 100. Multiple partition plates 3 are fixedly connected to the base plate 1 and laid flat in the S-shaped flow channel 100 along the medium flow direction. The cross-section of the partition plate 3 perpendicular to the length direction of the base plate 1 is wavy, and the partition plate 3 is provided with connecting holes 31 at equal intervals along the surface parallel to the length direction of the base plate 1. The connecting holes 31 not only connect the areas of the S-shaped flow channel 100 located on both sides of the partition plate 3, but also connect the rotational positions of the S-shaped flow channel 100 after the partition plate 3 is placed in the S-shaped flow channel 100.

[0019] The large-capacity battery cell cold plate proposed in this embodiment is arranged in the S-shaped flow channel 100 with multiple partition plates 3 laid flat along the medium flow direction. The partition plates 3 have a wavy cross section along the length direction perpendicular to the base plate 1, which increases the contact surface area inside the flow channel and improves the heat dissipation capacity. The partition plates 3 are provided with connecting holes 31 at equal intervals along the surface parallel to the length direction of the base plate 1, which improves the fluidity of the medium on both sides of the partition plates 3, making the medium flow more uniform and improving the heat dissipation performance.

[0020] In some embodiments, the corrugations of two adjacent partition plates 3 are staggered. By staggering the corrugations of two adjacent partition plates 3, turbulence can be enhanced, reducing overall resistance while improving fluid mixing near the boundary layer and increasing the flow rate of the medium, thereby improving cooling efficiency.

[0021] In some embodiments, the S-shaped flow channel 100 includes a plurality of direct flow channels 110 and connecting flow channels 120. The plurality of direct flow channels 110 are arranged along the length direction of the base plate 1 and are parallel to each other. The connecting flow channels 120 connect two adjacent direct flow channels 110, and the two connecting flow channels 120 connected by the same direct flow channel 110 are located at both ends of the length direction of the direct flow channel 110. The above structure forms an S-shaped flow channel 100 with the ends connected, which facilitates the arrangement of the partition plates 3. The partition plates 3 located in the direct flow channels 110 are arranged along the length direction of the direct flow channels 110, and the cross-section of the partition plates 3 perpendicular to the length direction of the direct flow channels 110 is wavy.

[0022] In some embodiments, four DC channels 110 are provided, and the ratio of the width of the DC channel 110 to the width of the partition 12 is 3 to 10. By setting the above parameters, the DC channel 110 is widened, increasing the filling area of ​​the partition plate 3 and further reducing the overall resistance.

[0023] In some embodiments, the connecting hole 31 of the partition plate 3 located at the connecting flow channel 120 connects two adjacent direct flow channels 110. The partition plate 3 located at the connecting flow channel 120 has a wavy cross section perpendicular to the length direction of the base plate 1, and its connecting hole 31 can connect two adjacent direct flow channels 110, thereby avoiding resistance to the connecting flow channel 120 and improving the fluidity of the medium.

[0024] In some embodiments, there are gaps between the two sides of the partition plate 3 located at the connecting channel 120 and the two ends of the connecting channel 120 in the width direction. By setting the gaps, the medium between two adjacent direct current channels 110 can flow more smoothly, improving heat dissipation and heat equalization.

[0025] In some embodiments, the thickness of the partition plate 3 is the same as the depth of the groove 11. By setting the thickness of the partition plate 3 to be the same as the depth of the groove 11, the medium will only flow along the S-shaped flow channel 100 after the cover plate 2 and the bottom plate 1 are sealed together, making the flow more stable and reliable.

[0026] The working principle of this high-capacity battery cell cold plate is as follows: After the medium enters the S-shaped flow channel 100 from the liquid inlet column 21, it passes through the action of multiple partition plates 3. The partition plates 3 have a wavy cross section along the length direction perpendicular to the base plate 1, which can increase the contact surface area inside the flow channel and improve the heat dissipation capacity. The partition plates 3 are provided with connecting holes 31 at equal intervals along the surface parallel to the length direction of the base plate 1, which improves the fluidity of the medium on both sides of the partition plates 3, making the medium flow more uniform and improving the heat dissipation performance.

[0027] Based on the same concept, a second aspect of this utility model provides a battery pack including battery cells and a high-capacity battery cell cooling plate as described in the first aspect, the high-capacity battery cell cooling plate being used to dissipate heat from the battery cells.

[0028] The battery pack proposed in this embodiment is arranged in the S-shaped flow channel 100 with multiple partition plates 3 laid flat along the medium flow direction. The partition plates 3 have a wavy cross section along the length direction perpendicular to the bottom plate 1, which increases the contact surface area inside the flow channel and improves the heat dissipation capacity.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-capacity battery cell cold plate, characterized in that, Includes a base plate (1), a cover plate (2), and multiple partition plates (3), wherein: The base plate (1) is provided with a groove (11) and a plurality of partitions (12). The plurality of partitions (12) are arranged in parallel in the groove (11) to divide the groove (11) into S-shaped flow channels (100). The partitions (12) are straight. The cover plate (2) is sealed to the bottom plate (1); Multiple partition plates (3) are fixedly connected to the base plate (1) and laid flat in the S-shaped flow channel (100) along the medium flow direction. The partition plate (3) has a wavy cross section perpendicular to the length direction of the base plate (1). The partition plate (3) is provided with connecting holes (31) at equal intervals along the surface parallel to the length direction of the base plate (1).

2. The high-capacity cell cold plate as described in claim 1, characterized in that, The wavy shapes of two adjacent partition plates (3) are misaligned.

3. The high-capacity cell cold plate as described in claim 1, characterized in that, The S-shaped flow channel (100) includes multiple direct flow channels (110) and connecting flow channels (120). The multiple direct flow channels (110) are arranged along the length direction of the base plate (1) and are parallel to each other. The connecting flow channel (120) connects two adjacent direct flow channels (110). The two connecting flow channels (120) connected by the same direct flow channel (110) are located at both ends of the length direction of the direct flow channel (110).

4. The high-capacity cell cold plate as described in claim 3, characterized in that, The DC channel (110) is provided in four parts, and the ratio of the width of the DC channel (110) to the width of the spacer (12) is 3 to 10.

5. The high-capacity cell cold plate as described in claim 4, characterized in that, The connecting hole (31) of the partition plate (3) located at the connecting channel (120) connects two adjacent direct current channels (110).

6. The high-capacity cell cold plate as described in claim 5, characterized in that, There are gaps between the two sides of the partition plate (3) located at the connecting channel (120) and the two ends of the connecting channel (120) in the width direction.

7. The high-capacity cell cold plate as described in claim 1, characterized in that, The thickness of the partition plate (3) is the same as the depth of the groove (11).

8. A battery pack, characterized in that, It includes battery cells, and a high-capacity battery cell cold plate as described in any one of claims 1-7, wherein the high-capacity battery cell cold plate is used to dissipate heat from the battery cells.

Images