Battery cooling device

Abstract

The utility model relates to a battery cooling device which comprises a plurality of battery packs, a liquid cooling plate is arranged between at least two battery packs, and a first main flow channel and a second main flow channel which extend in the left-right direction are arranged in the liquid cooling plate. A plurality of first sub-runners and second sub-runners which extend in the vertical direction are arranged between the first main runner and the second main runner, the first sub-runners are communicated with the first main runner, the second sub-runners are communicated with the second main runner, and the first sub-runners and the second sub-runners are alternately arranged in the liquid cooling plate in the left-right direction; a plurality of overflow channels extending in the left-right direction are further arranged between the first main flow channel and the second main flow channel, and the first branch flow channel and the second branch flow channel are both communicated with the overflow channels. Cooling liquid can enter the first sub-runners in a relatively low-temperature state, and then flows to the second main runner after effective heat exchange through the overflow channels, so that it is ensured that all parts of the liquid cooling plate can obtain a relatively consistent cooling effect.

Description

Technical Field

[0001] This utility model relates to the field of battery cooling technology, and specifically to a battery cooling device. Background Technology

[0002] With the rapid development of new energy vehicles, battery performance has become a key focus for users. Batteries typically generate a significant amount of heat during charging and discharging. If this heat is not cooled and dissipated in time, it will cause the battery temperature to rise, thereby affecting the battery's safety, efficiency, and lifespan.

[0003] For cooling prismatic battery packs, existing solutions typically involve installing a liquid cooling plate at the bottom of the pack, utilizing the thermal conductivity of the cells to regulate the overall temperature. However, traditional liquid cooling plates usually have only a single flow channel structure, meaning the coolant flows from the inlet through each battery cell sequentially to the outlet. The coolant encounters significant flow resistance as it passes through the channel, reducing cooling efficiency. Furthermore, as the flow path increases, the coolant temperature rises, meaning the cells at the end of the flow path are generally less cooled than those at the inlet. This results in batteries in the same row not receiving the same cooling effect simultaneously, leading to significant temperature differences between individual cells and impacting the overall performance and lifespan of the battery pack. Utility Model Content

[0004] The purpose of this invention is to provide a battery cooling device that solves the above-mentioned problems through the combination of a shunt structure and an overflow channel.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a battery cooling device, including multiple battery packs, with a liquid cooling plate between at least two battery packs. The liquid cooling plate has a first main channel and a second main channel extending in the left and right directions for coolant to flow in and out respectively. Between the first main channel and the second main channel, there are multiple first branch channels and second branch channels extending in the up and down directions. The first branch channels are connected to the first main channel, and the second branch channels are connected to the second main channel. The first branch channels and the second branch channels are alternately arranged in the left and right directions in the liquid cooling plate. Between the first main channel and the second main channel, there are also multiple overflow channels extending in the left and right directions. The first branch channels and the second branch channels are all connected to the overflow channels.

[0006] As a further optimization of this utility model, the liquid cooling plate includes two first cooling plates and a second cooling plate sandwiched between the two first cooling plates. The first and second flow channels are both provided on the second cooling plate, and the first cooling plate has an overflow channel on its side wall near the second cooling plate.

[0007] As a further optimization of this utility model, both first cold plates are provided with overflow channels, and the overflow channels on the two first cold plates are symmetrically arranged.

[0008] As a further optimization of this utility model, the overflow channel is a slot provided on the first cold plate, and the first diversion channel and the second diversion channel are through slots provided on the second cold plate. The first diversion channel and the overflow channel form a first junction at the intersection of their projection planes in the front-back direction, and the second diversion channel and the overflow channel form a second junction at the intersection of their projection planes in the front-back direction, allowing them to communicate.

[0009] As a further optimization of this utility model, the first cold plate is provided with a plurality of first blocking strips extending in the left and right direction, and the overflow channel is formed by the gap between adjacent first blocking strips.

[0010] As a further optimization of this utility model, the second cold plate is provided with a plurality of second blocking strips extending in the vertical direction and abutting against the first blocking strip, and the first diversion channel and the second diversion channel are provided in the gap between adjacent second blocking strips.

[0011] As a further optimization of this utility model, the second cold plate is also provided with a plurality of third and fourth blocking strips extending in the left and right direction and abutting against the first blocking strip. The two ends of the third blocking strip are respectively connected to the lower ends of two adjacent second blocking strips, and the two ends of the fourth blocking strip are respectively connected to the upper ends of two adjacent second blocking strips. The third and fourth blocking strips are alternately distributed, so that the second, third, and fourth blocking strips together form a serpentine blocking structure.

[0012] As a further optimization of this utility model, each battery pack consists of multiple batteries, with the batteries in the same battery pack arranged in the left-right direction and the batteries in each battery pack arranged in the front-back direction, so that all batteries are distributed in an array, and the liquid cooling plate is disposed between two adjacent battery packs.

[0013] As a further optimization of this utility model, the battery cooling device further includes an inlet pipe that is connected to the first main channel of each liquid cooling plate and an outlet pipe that is connected to the second main channel of each liquid cooling plate, wherein the inlet pipe and the outlet pipe are arranged diagonally on the liquid cooling plate.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. By setting multiple first distribution channels and multiple second distribution channels, the coolant can enter each first distribution channel from the first main channel at a relatively low temperature. Then, after effective heat exchange through the overflow channel, it flows to the second main channel through the second distribution channel. This allows the coolant to absorb the heat generated by the battery more evenly, ensuring that the liquid cooling plate can obtain a relatively consistent cooling effect and reducing the temperature difference between battery cells.

[0016] 2. By combining multiple first and second flow channels with multiple overflow channels, multiple paths for parallel flow of coolant are formed, which reduces the flow resistance of coolant and improves cooling efficiency compared to the traditional single flow path.

[0017] 3. By symmetrically setting overflow channels on the two first cold plates, the liquid cooling plates can achieve the same cooling effect on the batteries on both sides, which helps the battery pack to achieve a more uniform temperature distribution. Attached Figure Description

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0020] Figure 2 This is an exploded view of the liquid cooling plate in this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the second cold plate in this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the first cold plate in this utility model;

[0023] Figure 5 This is a cross-sectional view of the liquid cooling plate in this utility model. Figure 1 ;

[0024] Figure 6 This is a cross-sectional view of the liquid cooling plate in this utility model. Figure 2 . Detailed Implementation

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] like Figures 1 to 6As shown, this utility model discloses a battery cooling device, including multiple battery packs 1. At least two battery packs 1 are provided with a liquid cooling plate 2. The liquid cooling plate 2 is provided with a first main channel 31 and a second main channel 32 extending in the left and right directions and respectively for coolant to flow in and out. Between the first main channel 31 and the second main channel 32, there are multiple first branch channels 41 and second branch channels 42 extending in the up and down directions. The first branch channels 41 are connected to the first main channel 31, and the second branch channels 42 are connected to the second main channel 32. The first branch channels 41 and the second branch channels 42 are alternately arranged in the left and right directions in the liquid cooling plate 2. Between the first main channel 31 and the second main channel 32, there are also multiple overflow channels 33 extending in the left and right directions. The first branch channels 41 and the second branch channels 42 are all connected to the overflow channels 33.

[0027] The coolant can be a highly thermally conductive liquid such as water, nanofluid, or a mixture, and there are no restrictions on this. The first main channel 31 and the second main channel 32 are used for the inflow and outflow of the coolant, respectively, to ensure continuous circulation of the coolant and effectively remove the heat generated by the battery pack 1. The coolant in the overflow channel 33 can maintain the liquid cooling plate 2 at a suitable temperature, so that the liquid cooling plate 2 can exchange heat with the battery pack 1 and achieve cooling of the battery pack 1. The first branch channel 41 and the second branch channel 42 are alternately arranged in the left and right direction in the liquid cooling plate 2 to improve the coverage of the overflow channel 33 of the coolant, thereby ensuring the heat exchange capacity of the liquid cooling plate 2.

[0028] In this embodiment, the coolant flowing into the liquid cooling plate 2 enters the first main channel 31 and then flows along the extension direction of the first main channel 31 into the nearest first branch channel 41. After a certain amount of coolant is injected into the first branch channel 41, the coolant in the first branch channel 41 flows into the overflow channel 33 connected to it. At this time, the amount of coolant flowing out through the overflow channel 33 is less than the amount of coolant flowing into the first branch channel 41. When the first branch channel 41 reaches its capacity limit, the subsequent coolant will flow into the next first branch channel 41, and so on, thereby ensuring that the coolant can be distributed relatively evenly in each first branch channel 41. At the same time, with the inflow of new coolant, the coolant in the overflow channel 33 undergoes heat exchange and flows into the second branch channel 42, and then flows along the second branch channel 42 to the second main channel 32 and out of the liquid cooling plate 2, thus completing the cooling cycle.

[0029] In this embodiment, the first main channel 31 and the second main channel 32 are located at the upper and lower parts of the liquid cooling plate 2, respectively, providing sufficient space for the overflow channel 33. The shapes of the first main channel 31, the second main channel 32, the overflow channel 33, the first branch channel 41, and the second branch channel 42 can be rectangular, tubular, or other shapes, and are not limited here.

[0030] With the arrangement of multiple first branch channels 41 and multiple second branch channels 42, the coolant can enter each first branch channel 41 from the first main channel 31 at a relatively low temperature. Then, after effective heat exchange through the overflow channel 33, it flows to the second main channel 32 through the second branch channel 42. This allows the coolant to absorb the heat generated by the battery more evenly, ensuring that the liquid cooling plate 2 can obtain a relatively consistent cooling effect and reducing the temperature difference between battery cells. Through the coordinated arrangement of multiple first branch channels 41, second branch channels 42 and multiple overflow channels 33, multiple paths for parallel flow of coolant are formed. Compared with the traditional single flow path, this can reduce the flow resistance of coolant and improve cooling efficiency.

[0031] The liquid cooling plate 2 includes two first cooling plates 3 and a second cooling plate 4 sandwiched between the two first cooling plates 3. The first diversion channel 41 and the second diversion channel 42 are both provided on the second cooling plate 4. The first cooling plate 3 has an overflow channel 33 on its side wall near the second cooling plate 4.

[0032] The liquid cooling plate 2 is composed of two first cold plates 3 and a second cold plate 4 sandwiched between the two first cold plates 3, which facilitates the manufacturing and maintenance of the liquid cooling plate 2. By setting the overflow channel 33 on the first cold plate 3, the two side walls of the liquid cooling plate 2 have better heat exchange capacity, and the flow channel is concentrated on the second cold plate 4, which can more effectively control the flow path of the coolant.

[0033] Both of the first cold plates 3 are provided with overflow channels 33, and the overflow channels 33 on the two first cold plates 3 are symmetrically arranged.

[0034] By symmetrically setting overflow channels 33 on the two first cold plates 3, the overflow channels 33 on the two first cold plates 3 correspond one-to-one, thereby making the cooling effect of the liquid cooling plate 2 on the batteries on both sides the same.

[0035] The overflow channel 33 is a slot provided on the first cold plate 3. The first diversion channel 41 and the second diversion channel 42 are through slots provided on the second cold plate 4. The first diversion channel 41 and the overflow channel 33 form a first junction 51 at the intersection of their projection planes in the front-back direction, allowing the two to communicate. The second diversion channel 42 and the overflow channel 33 form a second junction 52 at the intersection of their projection planes in the front-back direction, allowing the two to communicate.

[0036] The design of the overflow channel 33 as a slot and the second diversion channel 42 as a through channel results in a simple structure. The slots and through channels form the first junction 51 and the second junction 52, which reduces the manufacturing difficulty and cost.

[0037] The first cold plate 3 is provided with a plurality of first blocking strips 34 extending in the left and right direction, and the overflow channel 33 is formed by the gap between adjacent first blocking strips 34.

[0038] The flow of coolant in the overflow channel 33 is guided by the first baffle 34, which is formed by the gap between adjacent first baffles 34, reducing manufacturing complexity.

[0039] The second cold plate 4 is provided with a plurality of second blocking bars 43 extending in the vertical direction and abutting against the first blocking bar 34. The first diversion channel 41 and the second diversion channel 42 are provided in the gap between adjacent second blocking bars 43.

[0040] The second cold plate 4 is also provided with a plurality of third blocking bars 44 and fourth blocking bars 45 extending in the left and right direction and abutting against the first blocking bar 34. The two ends of the third blocking bar 44 are respectively connected to the lower ends of two adjacent second blocking bars 43, and the two ends of the fourth blocking bar 45 are respectively connected to the upper ends of two adjacent second blocking bars 43. The third blocking bars 44 and fourth blocking bars 45 are alternately distributed, so that the second blocking bars 43, the third blocking bars 44 and the fourth blocking bars 45 together form a serpentine blocking structure.

[0041] The third and fourth blocking strips 44 and 45 are alternately distributed vertically along the left-right direction, thereby achieving the alternating arrangement of the first and second branch channels 41 and 42 in the liquid cooling plate 2 in the left-right direction through a simple structure. The third and fourth blocking strips 44 and 45 abut against the first blocking strip 34, thereby restricting the flow of coolant in the first main channel 31 into the second branch channel 42, and the flow of coolant in the first branch channel 41 into the second main channel 32, ensuring that coolant can only flow into or out of the branch channels through predetermined connecting ports.

[0042] In one embodiment, a turbulence generator or fins may be added to the overflow channel 33 to enhance the heat exchange capacity of the overflow channel 33 and improve the heat transfer efficiency.

[0043] Each battery pack 1 consists of multiple batteries 11. The batteries 11 in the same battery pack 1 are arranged in the left-right direction, and the batteries 1 in each group are arranged in the front-back direction, so that all batteries 11 are distributed in an array. The liquid cooling plate 2 is located between two adjacent battery packs 1.

[0044] The array distribution of batteries 11 can improve space utilization. The liquid cooling plate 2 is located between adjacent battery packs 1, which can uniformly cover more batteries 11 and ensure the consistency of temperature distribution in the entire array.

[0045] The battery cooling device further includes an inlet pipe 7 that is connected to the first main channel 31 of each liquid cooling plate 2, and an outlet pipe 8 that is connected to the second main channel 32 of each liquid cooling plate 2. The inlet pipe 7 and the outlet pipe 8 are arranged diagonally on the liquid cooling plate 2.

[0046] In this embodiment, the outlet side of the inlet pipe 7 is closed, and the inlet side of the outlet pipe 8 is closed. The coolant in the inlet pipe 7 can only flow to the outlet pipe 8 through the liquid cooling plate 2. The liquid cooling plates 2 are arranged in parallel. After entering from the inlet pipe 7, the coolant flows into each liquid cooling plate 2, completes the heat exchange process within the liquid cooling plate 2, and then merges into the outlet pipe 8. The inlet pipe 7 and the outlet pipe 8 are arranged diagonally on the liquid cooling plate 2, which helps to ensure the uniform distribution of coolant throughout the liquid cooling plate 2 and improves heat exchange efficiency.

[0047] The following is a comparison between this embodiment and a traditional multi-branch shunt liquid cooling plate, comparing different volumetric heating powers while ensuring that the flow rate, heat exchange area, and fluid volume are basically the same. The details are shown in the table below:

[0048] Table 1: Analysis of Examples and Comparative Cases (I)

[0049]

[0050] Table 2: Analysis of Examples and Comparative Cases (II)

[0051]

[0052] As shown in Tables 1 and 2, the embodiment has a better cooling effect and a lower pressure drop compared to the comparative example.

[0053] The design of this battery cooling device is not limited to lithium battery cooling applications, but can also be extended to other fields that require efficient heat dissipation management, such as thermoelectric cooling and photovoltaic cell cooling.

Claims

1. A battery cooling device characterized by comprising: The device includes multiple battery packs (1), with a liquid cooling plate (2) between at least two battery packs (1). The liquid cooling plate (2) has a first main channel (31) and a second main channel (32) extending in the left and right directions for coolant to flow in and out respectively. Between the first main channel (31) and the second main channel (32), there are multiple first branch channels (41) and second branch channels (42) extending in the up and down directions. The first branch channel (41) is connected to the first main channel (31), and the second branch channel (42) is connected to the second main channel (32). The first branch channel (41) and the second branch channel (42) are alternately arranged in the left and right directions in the liquid cooling plate (2). Between the first main channel (31) and the second main channel (32), there are also multiple overflow channels (33) extending in the left and right directions. The first branch channel (41) and the second branch channel (42) are both connected to the overflow channels (33).

2. The battery cooling device of claim 1, wherein, The liquid cooling plate (2) includes two first cooling plates (3) and a second cooling plate (4) sandwiched between the two first cooling plates (3). The first diversion channel (41) and the second diversion channel (42) are both provided on the second cooling plate (4). The first cooling plate (3) has an overflow channel (33) on its side wall near the second cooling plate (4).

3. A battery cooling device according to claim 2, wherein Both of the first cold plates (3) are provided with overflow channels (33), and the overflow channels (33) on the two first cold plates (3) are symmetrically arranged.

4. The battery cooling device of claim 2, wherein, The overflow channel (33) is a slot provided on the first cold plate (3). The first diversion channel (41) and the second diversion channel (42) are through slots provided on the second cold plate (4). The first diversion channel (41) and the overflow channel (33) form a first junction (51) for communication between the two at the intersection of their projection planes in the front-back direction. The second diversion channel (42) and the overflow channel (33) form a second junction (52) for communication between the two at the intersection of their projection planes in the front-back direction.

5. A battery cooling device according to claim 4, wherein The first cold plate (3) is provided with a plurality of first blocking strips (34) extending in the left and right direction, and the overflow channel (33) is formed by the gap between adjacent first blocking strips (34).

6. A battery cooling device according to claim 5, wherein The second cold plate (4) is provided with a plurality of second blocking strips (43) extending in the vertical direction and abutting against the first blocking strip (34), and the first diversion channel (41) and the second diversion channel (42) are provided in the gap between adjacent second blocking strips (43).

7. A battery cooling device according to claim 6, wherein The second cold plate (4) is also provided with a plurality of third blocking strips (44) and fourth blocking strips (45) extending in the left and right direction and abutting against the first blocking strip (34). The two ends of the third blocking strip (44) are respectively connected to the lower ends of two adjacent second blocking strips (43), and the two ends of the fourth blocking strip (45) are respectively connected to the upper ends of two adjacent second blocking strips (43). The third blocking strips (44) and fourth blocking strips (45) are alternately distributed, so that the second blocking strips (43), the third blocking strips (44) and the fourth blocking strips (45) together form a serpentine blocking structure.

8. The battery cooling device of claim 1, wherein, Each battery pack (1) consists of multiple batteries (11). The batteries (11) in the same battery pack (1) are arranged in the left-right direction, and the battery packs (1) in each group are arranged in the front-back direction, so that all the batteries (11) are distributed in an array. The liquid cooling plate (2) is located between two adjacent battery packs (1).

9. The battery cooling device of claim 1, wherein, The battery cooling device further includes an inlet pipe (7) that is connected to the first main channel (31) of each liquid cooling plate (2) and an outlet pipe (8) that is connected to the second main channel (32) of each liquid cooling plate (2). The inlet pipe (7) and the outlet pipe (8) are arranged diagonally on the liquid cooling plate (2).

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