Liquid cooling plate and battery pack thereof

Abstract

The utility model discloses a liquid cooling plate and a battery pack thereof. The liquid cooling plate comprises a liquid inlet pipe water nozzle, a liquid inlet pipe, a runner plate, a liquid outlet pipe and a liquid outlet pipe water nozzle, a liquid inlet connector is arranged in the middle of the side, close to the liquid inlet pipe water nozzle, of the runner plate, a liquid outlet connector is arranged at the end of the side, close to the liquid outlet pipe water nozzle, of the runner plate, and the liquid inlet pipe and the liquid outlet pipe are arranged in parallel in the length direction of the runner plate. The liquid inlet pipe is used for communicating the liquid inlet pipe water nozzle with the liquid inlet joint; the liquid outlet pipe is used for communicating the liquid outlet joint with the liquid outlet pipe water nozzle; the liquid inlet pipe is arranged on one surface, far away from the battery module, of the runner plate; and at least two runners arranged along the width direction of the runner plate are arranged in the runner plate. According to the utility model, at least two runners are arranged along the width direction of the runner plate, so that compared with a single runner, the radiating efficiency is higher; and secondly, the liquid inlet connector is arranged in the middle of the runner plate in the length direction, so that the flowing path of the cooling liquid is shortened, and the flow resistance of the cooling liquid is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, concretely relates to a liquid cooling plate and battery pack thereof. BACKGROUND

[0002] The existing commercial vehicle liquid cooling plate commonly uses sectional material liquid cooling plate, which is internally provided with a single U-shaped flow channel, and the heat dissipation path is relatively long, which can reduce the heat exchange efficiency of the liquid cooling plate, and the temperature uniformity performance is poor, the liquid cooling circulation resistance is relatively large, and the heat exchange power is limited.

[0003] Therefore, a new scheme is needed to solve the above problems. SUMMARY

[0004] The utility model provides a liquid cooling plate can solve the inside of existing sectional material liquid cooling plate is provided with single U-shaped flow channel, and the heat dissipation path is relatively long, which can reduce the heat exchange efficiency of the liquid cooling plate, and the temperature uniformity performance is poor, the liquid cooling circulation resistance is relatively large, and the heat exchange power is limited, and the inlet of the existing liquid cooling plate is arranged at the end of the liquid cooling plate, which can make the liquid cooling circulation path too long, and the heat exchange effect is poor.

[0005] The utility model provides a liquid cooling plate, including liquid inlet pipe water nozzle, liquid inlet pipe, flow channel board, liquid outlet pipe and liquid outlet pipe water nozzle;

[0006] The middle part of the side of flow channel board close to liquid inlet pipe water nozzle is provided with liquid inlet connector, and the end of the side of flow channel board close to liquid outlet pipe water nozzle is provided with liquid outlet connector, and the liquid inlet pipe and liquid outlet pipe are arranged in parallel along the length direction of flow channel board;

[0007] The liquid inlet pipe is used for connecting liquid inlet pipe water nozzle and liquid inlet connector, and the liquid outlet pipe is used for connecting liquid outlet connector and liquid outlet pipe water nozzle;

[0008] The liquid inlet pipe is arranged on the side of flow channel board away from the battery module;

[0009] At least two flow channels are arranged in the flow channel board along the width direction of the flow channel board.

[0010] Further, the liquid inlet pipe water nozzle and the liquid outlet pipe water nozzle are arranged on the same end of the liquid cooling plate.

[0011] Further, the first flow distribution part is arranged in the flow channel board close to the liquid inlet connector along the length direction of the flow channel board, and the two ends of the first flow distribution part are not in contact with the inner surface of the side wall of the flow channel board.

[0012] Further, the second flow distribution part is arranged on the end wall of the flow channel plate at an end away from the first flow distribution part, and an end close to the first flow distribution part is arranged in an inclined manner along the fluid direction; an end of the third flow distribution part away from the second flow distribution part is arranged in a bent manner towards the side close to the second flow distribution part, a gap between the third flow distribution part and the second flow distribution part forms an inlet of the first flow channel, and a gap between the third flow distribution part and the first flow distribution part forms an inlet of the second flow channel.

[0013] Further, a middle part of the first flow distribution part is convex towards the side close to the liquid inlet joint.

[0014] Further, an end of the third flow distribution part away from the second flow distribution part is arranged in an inclined manner towards the side away from the liquid inlet joint.

[0015] Further, a gap between an end of the first flow distribution part away from the second flow distribution part and the side wall of the flow channel plate forms an inlet of the third flow channel, and outlets of the first flow channel, the second flow channel and the third flow channel are connected to the liquid outlet joint through an outlet collecting section.

[0016] Further, the liquid cooling plate further comprises an upper cover arranged on a side of the flow channel plate close to the battery module, and a cooling flow channel is formed between the flow channel plate and the upper cover.

[0017] Further, a side of the flow channel plate away from the battery module is provided with a side beam and a middle beam arranged along the width direction, two side beams are arranged on the left and right sides of the flow channel plate, and a single middle beam is arranged in the middle of the flow channel plate, and a space for accommodating the liquid inlet joint is formed in the middle beam.

[0018] The utility model also provides a battery pack comprising the above liquid cooling plate.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The utility model firstly arranges at least two flow channels along the width direction of the flow channel plate, and the heat dissipation efficiency is higher than that of a single flow channel; secondly, the liquid inlet joint is arranged at the middle position of the length direction of the flow channel plate, thereby shortening the flow path of the cooling liquid, reducing the flow resistance of the cooling liquid, and improving the heat exchange effect; finally, the liquid inlet pipe is arranged on the side of the flow channel plate away from the battery module, which facilitates the installation of the battery module and avoids the arrangement of the liquid inlet pipe on the side end of the liquid cooling plate, thereby avoiding the excessive size of the liquid cooling plate along the horizontal plane and affecting the arrangement of the whole battery pack.

[0021] 2. The utility model makes the middle part of the first flow distribution part convex towards the side close to the liquid inlet joint, so that the first flow distribution part forms a U shape as a whole, the cooling liquid flowing out of the liquid inlet joint is divided into two parts, and the guiding effect is better. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the liquid cooling plate and the top cover in the first embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram from another perspective of the overall structure of the liquid cooling plate and the top cover in the first embodiment of this utility model;

[0024] Figure 3 This is a top view of the liquid cooling plate according to the first embodiment of this utility model;

[0025] Figure 4 This is a top view of the liquid cooling plate according to the second embodiment of this utility model;

[0026] Reference numerals in the attached drawings: 1. Inlet nozzle; 2. Inlet pipe; 3. Flow channel plate; 31. Inlet connector; 32. Outlet connector; 331. First diversion section; 332. Second diversion section; 333. Third diversion section; 3331. First end; 3332. Second end; 34. First flow channel; 35. Second flow channel; 36. Third flow channel; 371. Straight section; 372. Bend section; 38. Inlet converging section; 39. Outlet converging section; 4. Outlet pipe; 5. Outlet nozzle; 61. Side beam; 62. Middle beam; 7. Top cover; 8. Frame; 9. Baffle column. Detailed Implementation

[0027] To further understand the utility model's content, features, and effects, the following embodiments are provided, along with accompanying drawings. Figures 1-4 The details are as follows.

[0028] like Figures 1-3 As shown, Embodiment 1 of this utility model provides a liquid cooling plate, including a liquid inlet nozzle 1, a liquid inlet pipe 2, a flow channel plate 3, a liquid outlet pipe 4, and a liquid outlet nozzle 5;

[0029] The flow channel plate 3 is provided with an inlet connector 31 in the middle of the side near the inlet pipe nozzle 1, and an outlet connector 32 is provided at the end of the flow channel plate 3 near the outlet pipe nozzle 5. The inlet pipe 2 and the outlet pipe 4 are arranged parallel to each other along the length of the flow channel plate 3.

[0030] The inlet pipe 2 is used to connect the inlet pipe nozzle 1 and the inlet connector 31; the outlet pipe 4 is used to connect the outlet connector 32 and the outlet pipe nozzle 5.

[0031] The liquid inlet pipe 2 is located on the side of the flow channel plate 3 away from the battery module;

[0032] The flow channel plate 3 is provided with three flow channels arranged along the width direction of the flow channel plate 3, namely the first flow channel 34, the second flow channel 35 and the third flow channel 36. The number of flow channels can also be adjusted to other values ​​of no less than two. In the figure, the x direction is the length direction of the flow channel plate 3 and the y direction is the width direction of the flow channel plate 3.

[0033] This invention firstly, by setting at least two flow channels along the width of the flow channel plate, the heat dissipation efficiency is higher than that of a single flow channel. Secondly, by placing the liquid inlet connector in the middle of the length of the flow channel plate, the flow path of the coolant is shortened, the flow resistance of the coolant is reduced, and the heat exchange effect is improved. Finally, by placing the liquid inlet pipe on the side of the flow channel plate away from the battery module, it is convenient for the installation of the battery module, and at the same time, it avoids the liquid inlet pipe being placed on the side of the liquid cooling plate, which would make the entire liquid cooling plate too large along the horizontal plane and affect the arrangement of the entire battery pack.

[0034] In this first embodiment, as Figure 2 As shown, the inlet water nozzle 1 and the outlet water nozzle 5 are located at the same end of the liquid cooling plate, which facilitates the arrangement.

[0035] In this first embodiment, as Figure 3 As shown, a first diversion section 331 is provided in the flow channel plate 3 near the liquid inlet connector 31, arranged along the length direction of the flow channel plate 3. The two ends of the first diversion section 331 do not contact the inner surface of the side wall of the flow channel plate 3. The first diversion section 331 is a certain distance away from the side wall of the flow channel plate 3, thus forming an inlet collecting section 38. This provides flow space for the coolant flowing in from the liquid inlet connector 31. The coolant to the left of the inlet collecting section 38 flows into the third flow channel 36, and the coolant to the right flows into the first flow channel 34 and the second flow channel 35.

[0036] In this first embodiment, as Figure 3 As shown, a second branch section 332 and a third branch section 333 are spaced apart at the end of the first branch section 331 away from the liquid inlet pipe 2. The end of the second branch section 332 away from the first branch section 331 is located on the end wall of the flow channel plate 3. The end of the second branch section 332 near the first branch section 331 is inclined along the fluid direction. The shape of the second branch section 332 is a right-angled triangle. The end of the third branch section 333 near the second branch section 332, that is, the second end 3332 is bent towards the side near the second branch section 332, thus providing guidance for the coolant to enter the first flow channel 34. The gap between the third branch section 333 and the second branch section 332 forms the inlet of the first flow channel 34. The gap between the third branch section 333 and the first branch section 331 forms the inlet of the second flow channel 35. The second flow channel 35 is arranged in the middle position of the flow channel plate 3, and the first flow channel 34 and the third flow channel 35 are located on its left and right sides respectively.

[0037] In the first embodiment, as shown in Figure 3 The middle part of the first flow distribution part 331 protrudes towards the side close to the liquid inlet connector 31, so that the first flow distribution part 331 as a whole forms a U-shaped structure, which can divide the cooling liquid flowing out of the liquid inlet connector 31 into two parts and better plays a guiding role.

[0038] In the first embodiment, as shown in Figure 3 The first end 3331 of the third flow distribution part 333 away from the second flow distribution part 332 is inclinedly arranged away from the side of the liquid inlet connector 31, which better plays a flow guiding effect.

[0039] In the first embodiment, as shown in Figure 3 The gap between the end of the first flow distribution part 331 away from the second flow distribution part 332 and the side wall of the flow channel plate 3 forms the inlet of the third flow channel 36, and the outlets of the first flow channel 34, the second flow channel 35 and the third flow channel 36 are connected to the liquid outlet connector 32 through the outlet collecting section 39.

[0040] In the first embodiment, as shown in Figure 2 The side of the flow channel plate 3 close to the battery module is provided with an upper cover 7, and the flow channel plate 3 and the upper cover 7 jointly constitute a liquid cooling plate. The flow channel plate 3 and the upper cover 7 form the above-mentioned three flow channels for the cooling water to pass through. The upper cover 7 is connected to the flow channel plate 3 by brazing process, and the liquid pipe nozzle 1 and the liquid outlet pipe nozzle 5 are both arranged at the left end of the side beam 61.

[0041] In the first embodiment, as shown in Figure 3 The first flow channel 34, the second flow channel 35 and the third flow channel 36 each include a straight section 371 and a bent section 372, so that the three flow channels as a whole are S-shaped flow channels. Of course, the specific number of flow channels can also be adjusted according to actual conditions.

[0042] In the first embodiment, as shown in Figure 1 and 3 The side of the flow channel plate 3 away from the battery module is provided with a side beam 61 and a middle beam 62 arranged along the width direction. The two side beams 61 are respectively located at the left and right ends of the upper cover 7, and the side beam 61 and the middle beam 62 are fixed by a side frame 8. The upper end of the side frame 8 is fixedly arranged on the flow channel plate 3 by welding, and the side frame 8 is fixedly arranged on the flow channel plate 3 by welding. The side beam 61, the middle beam 62 and the side frame 8 play a supporting role for the upper battery cell and the liquid cooling plate. The two side beams 61 are arranged on the left and right sides of the flow channel plate 3, and a single middle beam 62 is arranged in the middle of the flow channel plate 3. The middle beam 62 is provided with a space for accommodating the liquid inlet connector 31. By arranging the side beam 61 and the middle beam 62, on the one hand, the installation space of the liquid inlet pipe 2 and the liquid outlet pipe 4 is provided.

[0043] Figure 4The embodiment two of the utility model is shown, and the difference between the embodiment two and the embodiment one is that the outlet of the second flow channel 35 is towards the end far from the liquid outlet pipe 4, and the outlet of the second flow channel 35 in the embodiment one is towards the end close to the liquid outlet pipe 4, so that the embodiment two guarantees the stability of overall heat dissipation, and the outlet is arranged closer to the liquid outlet pipe 4 in the embodiment one, so that the heat dissipation efficiency is higher.In addition, a plurality of cylindrical turbulence columns 9 are arranged in the middle of the inlet collection section 38 and the outlet collection section 39, which not only play a turbulence role, but also increase the heat exchange area, enhance the heat exchange efficiency, and also play a role of reinforcing ribs, and strengthen the strength of the liquid cooling plate.

[0044] The utility model also provides a battery pack, including above-mentioned liquid cooling plate.

[0045] The above-mentioned utility model only expresses the implementation mode of the embodiment of the utility model, and therefore cannot be understood as the limitation of the range of the utility model patent, and also is not any form of the limitation of the structure of the embodiment of the utility model.It should be pointed out that for ordinary skilled person in the art, under the premise of not departing from the concept of the embodiment of the utility model, a plurality of changes and improvements can be made, which belong to the protection scope of the embodiment of the utility model.

Claims

1. A liquid-cooled plate, characterized in that: It includes an inlet pipe nozzle (1), an inlet pipe (2), a flow channel plate (3), an outlet pipe (4), and an outlet pipe nozzle (5); The flow channel plate (3) is provided with an inlet connector (31) in the middle of the side near the inlet pipe nozzle (1), and an outlet connector (32) is provided at the end of the flow channel plate (3) near the outlet pipe nozzle (5). The inlet pipe (2) and the outlet pipe (4) are arranged parallel to each other along the length of the flow channel plate (3). The inlet pipe (2) is used to connect the inlet pipe nozzle (1) and the inlet connector (31); the outlet pipe (4) is used to connect the outlet connector (32) and the outlet pipe nozzle (5); The liquid inlet pipe (2) is located on the side of the flow channel plate (3) away from the battery module; The flow channel plate (3) has at least two flow channels arranged along the width direction of the flow channel plate (3).

2. The liquid cooling plate according to claim 1, characterized in that: The inlet water nozzle (1) and the outlet water nozzle (5) are located at the same end of the liquid cooling plate.

3. A liquid cooling plate according to claim 1, characterized in that: The flow channel plate (3) is provided with a first diversion part (331) arranged along the length direction of the flow channel plate (3) near the liquid inlet connector (31). The two ends of the first diversion part (331) do not contact the inner surface of the side wall of the flow channel plate (3).

4. A liquid cooling plate according to claim 3, characterized in that: The first diverter (331) is provided with a second diverter (332) and a third diverter (333) at an interval at one end away from the inlet pipe (2). The second diverter (332) is provided on the end wall of the flow channel plate (3) at one end away from the first diverter (331). The second diverter (332) is inclined along the fluid direction at one end near the first diverter (331). The third diverter (333) is bent toward the side near the second diverter (332) at one end near the second diverter (332). The gap between the third diverter (333) and the second diverter (332) forms the inlet of the first flow channel (34). The gap between the third diverter (333) and the first diverter (331) forms the inlet of the second flow channel (35).

5. A liquid-cooled plate according to claim 4, characterized in that: The middle part of the first diversion section (331) protrudes towards the side near the liquid inlet connector (31).

6. A liquid cooling plate according to claim 4, characterized in that: The third diversion section (333) is inclined at the end away from the second diversion section (332) towards the side away from the liquid inlet connector (31).

7. A liquid cooling plate according to claim 4, characterized in that: The gap between the end of the first diverter (331) away from the second diverter (332) and the side wall of the flow channel plate (3) forms the inlet of the third flow channel (36). The outlets of the first flow channel (34), the second flow channel (35) and the third flow channel (36) are connected to the liquid outlet connector (32) through the outlet converging section (39).

8. A liquid cooling plate according to claim 7, characterized in that: The liquid cooling plate also includes an upper cover (7) disposed on the side of the flow channel plate (3) near the battery module, and a cooling flow channel is formed between the flow channel plate (3) and the upper cover (7).

9. A liquid-cooled plate according to claim 1, characterized in that: The flow channel plate (3) is provided with a side beam (61) and a middle beam (62) arranged along the width direction on the side away from the battery module. The two side beams (61) are arranged on the left and right sides of the flow channel plate (3), and the single middle beam (62) is arranged in the middle of the flow channel plate (3). The middle beam (62) has a space for accommodating the liquid inlet connector (31).

10. A battery pack, characterized in that: Includes the liquid cooling plate as described in any one of claims 1 to 9.

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