Liquid cooling plate and battery cooling device

Abstract

The utility model discloses a liquid cooling plate and a battery cooling device, belongs to the technical field of battery cooling, and comprises a substrate and a runner plate, the runner plate is arranged on the substrate, the runner plate is provided with an inlet groove, an outlet groove, a shunting groove, a heat conduction area and a confluence groove, one end of the inlet groove is communicated with one end of the shunting groove, and the other end of the shunting groove is communicated with the heat conduction area. One end of the diversion groove is communicated with the outlet groove, the other end of the diversion groove is communicated with the heat conduction area, one end of the confluence groove is communicated with the outlet groove, the other end of the confluence groove is communicated with the heat conduction area, and a plurality of diversion strips are arranged in the diversion groove and arranged on one side of the heat conduction area at intervals. The direction of the flow guide strips is perpendicular to the direction of the inlet groove, cooling liquid enters the heat conduction area to take away heat on the battery after being subjected to flow division and speed reduction through the branch grooves, the covering area is wide, and heat dissipation is uniform.

Description

TECHNICAL FIELD

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

[0002] New energy vehicles, including pure electric vehicles, fuel cell vehicles and electric vehicles, electric vehicles use lithium-ion batteries to provide driving energy for vehicles, in the power lithium-ion battery system, the battery works and emits heat, the heat is transferred out through the contact between the battery module and the surface of the liquid cooling plate, and then the cooling liquid in the internal flow channel of the liquid cooling plate is dissipated to the outside, at present, high energy density square lithium-ion battery pack usually selects 52 or 104 square lithium-ion batteries in series, in order to ensure the consistency of temperature distribution of multiple lithium batteries, a liquid cooling plate with strong uniform temperature effect needs to be used for cooling.

[0003] The patent application with the publication number CN111477997A discloses a liquid cooling plate and a liquid cooling device, the scraping and coating integrated process comprises an upper plate, a lower plate and an intermediate plate connected between the upper plate and the lower plate; one side of the upper plate close to the intermediate plate is provided with a mounting groove, the side of the upper plate away from the intermediate plate is provided with a water inlet pipe and a water outlet pipe which are both in communication with the mounting groove; the middle part of the intermediate plate is formed with a plurality of convex strips and a plurality of liquid cooling grooves which are arranged opposite to the convex strips and correspond to the convex strips one by one, each convex strip is located in the mounting groove and connected with the bottom of the mounting groove, and each convex strip is provided with a liquid cooling hole on each side, which is in communication with the corresponding liquid cooling groove and the mounting groove. The application also provides a liquid cooling device comprising the above liquid cooling plate, but the liquid cooling plate does not control the flow rate and shunt of the entering liquid, resulting in uneven overall heat dissipation. SUMMARY

[0004] One of the purposes of the utility model is to provide a liquid cooling plate, which solves the problem that the cooling liquid in the existing liquid cooling plate flows unevenly in each area, resulting in different heat dissipation capacities.

[0005] To achieve the above-mentioned purposes of the utility model, the technical solutions adopted by the utility model are as follows:

[0006] A liquid cooling plate, comprising a substrate and a flow channel plate, the flow channel plate is arranged on the substrate, the flow channel plate is provided with an inlet groove, an outlet groove, a shunt groove, a heat conduction area and a flow converging groove, one end of the inlet groove is in communication with one end of the shunt groove, the other end of the shunt groove is in communication with the heat conduction area, one end of the flow converging groove is in communication with the outlet groove, the other end of the flow converging groove is in communication with the heat conduction area, a plurality of flow guide strips are arranged in the shunt groove, a plurality of the flow guide strips are arranged on one side of the heat conduction area at intervals, the directions of the plurality of flow guide strips are perpendicular to the direction of the inlet groove, and the cooling liquid enters the heat conduction area after being shunted and reduced in speed by the shunt groove, so as to take away the heat on the battery, which can cover a wide area and dissipate heat uniformly.

[0007] Further, the heat conduction area is provided with a first branch flow groove, a second branch flow groove and a third branch flow groove connected in sequence, the first branch flow groove, the second branch flow groove and the third branch flow groove are sequentially increased in distance from the inlet groove, the first branch flow groove, the second branch flow groove and the third branch flow groove are respectively communicated with the flow distribution groove, the first branch flow groove is arranged close to the inlet groove, the groove width is adjusted according to the distance and length of each branch flow groove from the inlet groove, so that the flow distance of the cooling liquid is the same, and the purpose of uniformly taking away heat is achieved.

[0008] Further, the width of the second branch flow groove and the third branch flow groove is the same, and the width of the first branch flow groove is smaller than that of the second branch flow groove, for adjusting the flow rate of the cooling liquid in the groove.

[0009] Further, the heat conduction area is provided with a fourth branch flow groove, the fourth branch flow groove is arranged close to the outlet groove, one end of the fourth branch flow groove is communicated with the third branch flow groove, and the other end of the fourth branch flow groove is communicated with the flow collecting groove, for expanding the coverage area of the heat conduction area and guiding the cooling liquid to flow out at the same time.

[0010] Further, the width of the fourth branch flow groove is smaller than that of the first branch flow groove, for adjusting the flow rate of the cooling liquid.

[0011] As preferred, the flow collecting groove is provided with a first flow guide column and a second flow guide column, the first flow guide column is arranged at the communication between the flow collecting groove and the third branch flow groove, and the second flow guide column is arranged at the communication between the second branch flow groove and the flow collecting groove, for guiding the cooling liquid to uniformly flow together and reducing the impact force of the cooling liquid.

[0012] As more preferred, the flow collecting groove is further provided with a first guide strip and a second guide strip, the first guide strip is arranged close to the fourth branch flow groove, and the second guide strip is arranged close to the second branch flow groove, for guiding the cooling liquid to flow outwards.

[0013] As more preferred, it further comprises a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are arranged on the base plate, the water inlet pipe is communicated with the inlet groove, and the water outlet pipe is communicated with the outlet groove, for the cooling liquid to enter and exit the flow channel plate.

[0014] As more preferred, it further comprises a first protruding part and a second protruding part, the first protruding part and the second protruding part are both arranged on the base plate, the first protruding part is arranged above the inlet groove, and the second protruding part is arranged above the outlet groove, to improve the strength of the inlet and outlet of the cooling liquid, thereby prolonging the service life.

[0015] The second purpose of the utility model is to provide a battery cooling device, which solves the problem of large temperature difference between different areas in the existing battery pack.

[0016] To achieve the above-mentioned utility model purposes, the utility model takes the technical solutions as follows:

[0017] A cooling device, comprising the liquid cooling plate, can uniformly dissipate heat in a large area.

[0018] The utility model has the advantages that:

[0019] (1) the liquid cooling plate is provided with a shunt groove, a heat conduction area and a collecting groove, the shunt groove is connected with the inlet groove, the cooling liquid entering the liquid cooling plate can be slowed down and then shunted into the heat conduction area, the heat conduction area directly absorbs the heat generated by the battery, the liquid flows uniformly and moves a similar distance in the heat conduction area, the cooled cooling liquid flows from the heat conduction area to the collecting area, is uniformly discharged outward through the collecting area, the heat conduction area can absorb heat and also can be heated uniformly, the heat dissipation of the heat conduction area is ensured to be the same, so that the temperature change of each area of the battery is uniform.

[0020] (2) the liquid cooling plate is provided with a first branch groove, a second branch groove, a third branch groove and a fourth branch groove which gradually move away from the shunt groove, the fourth branch groove has a smaller width than the first branch groove, the first branch groove has a smaller width than the second branch groove and the third branch groove, and the second branch groove and the third branch groove have a similar width, the width and relative position of the branch grooves are controlled, so that the heat dissipation capacity of the overall heat conduction area is more uniform. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model provides a front view of the flow channel plate;

[0022] Figure 2 The utility model provides a side view of the flow channel plate;

[0023] Figure 3 The utility model provides a Figure 2 The local enlarged view of the upper A part;

[0024] Figure 4 The utility model provides a front view of the substrate;

[0025] Figure 5 The utility model provides a temperature simulation diagram of the liquid cooling plate;

[0026] Figure 6 The utility model provides a temperature simulation diagram of the battery cooling device;

[0027] Figure 7 The utility model provides a temperature change diagram of each area in the battery pack.

[0028] REFERENCE SIGNS:

[0029] 1. Base plate; 11. Inlet pipe; 12. Outlet pipe; 13. First protrusion; 14. Second protrusion; 2. Flow channel plate; 21. Inlet groove; 22. Diverter groove; 221. Guide bar; 23. First branch groove; 24. Second branch groove; 25. Third branch groove; 26. Fourth branch groove; 27. Merging groove; 271. First guide column; 272. Second guide column; 273. First guide bar; 274. Second guide bar; 28. Outlet groove. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] Example 1

[0032] like Figures 1-7 As shown, this embodiment discloses a liquid cooling plate, including a substrate 1 and a flow channel plate 2. The flow channel plate 2 is disposed on the substrate 1 and has an inlet groove 21, an outlet groove 28, a diversion groove 22, a heat conduction zone, and a confluence groove 27. One end of the inlet groove 21 is connected to one end of the diversion groove 22, and the other end of the diversion groove 22 is connected to the heat conduction zone. One end of the confluence groove 27 is connected to the outlet groove 28, and the other end of the confluence groove 27 is connected to the heat conduction zone. The diversion groove 22 is provided with a plurality of guide strips 221, which are spaced apart on one side of the heat conduction zone. The direction of the plurality of guide strips 221 is perpendicular to the direction of the inlet groove 21. The diversion groove 22 is used to reduce the flow rate of the coolant and divert the coolant to different areas of the heat conduction zone, so that the coolant flowing in the heat conduction zone has a large dispersion area and moves the same distance, thereby achieving the effect of uniform heat absorption.

[0033] Among them, the inlet groove 21, outlet groove 28, diversion groove 22, heat conduction zone and confluence groove 27 on the flow channel plate 2 are all formed by stamping grooves, and multiple guide strips 221 are arranged in a straight line to reduce the flow rate of coolant and guide the flow direction of coolant.

[0034] Furthermore, the heat conduction zone is provided with a first branch channel 23, a second branch channel 24, and a third branch channel 25 connected in sequence. The distances between the first branch channel 23, the second branch channel 24, and the third branch channel 25 and the inlet channel 21 increase sequentially. The first branch channel 23, the second branch channel 24, and the third branch channel 25 are respectively connected to the diversion channel 22. The first branch channel 23 is set close to the inlet channel 21 to expand the heat dissipation area of ​​the heat conduction zone, while ensuring that the coolant moves the same distance in each branch channel.

[0035] Further, the width of the second branch flow groove 24 and the third branch flow groove 25 is the same, the width of the first branch flow groove 23 is smaller than the width of the second branch flow groove 24, the smaller the width, the greater the resistance of the cooling liquid flow, the first branch flow groove 23 is closest to the inlet groove 21, the cooling liquid flows fastest, by adjusting the width of each branch flow groove, the running distance of the cooling liquid in the flow channel is the same, and the effect of uniform heat absorption is achieved.

[0036] Further, the fourth branch flow groove 26 is arranged in the heat conduction area, the fourth branch flow groove 26 is arranged close to the outlet groove 28, one end of the fourth branch flow groove 26 is communicated with the third branch flow groove 25, the other end of the fourth branch flow groove 26 is communicated with the collecting groove 27, and the fourth branch flow groove 26 is used for guiding the cooling liquid farthest from the inlet groove 21 to flow out, the covering area of the fourth branch flow groove 26 is smaller than that of other branch flow grooves, and the cooling liquid flows in the fourth branch flow groove 26 for the shortest distance.

[0037] Further, the width of the fourth branch flow groove 26 is smaller than the width of the first branch flow groove 23, which is used for reducing the flow speed of the cooling liquid and uniformizing the flow speed in each branch flow groove, so that the effect of uniform heat dissipation is achieved.

[0038] Preferably, the collecting groove 27 is provided with a first flow guide column 271 and a second flow guide column 272, the first flow guide column 271 is arranged at the communication position of the collecting groove 27 and the third branch flow groove 25, and the second flow guide column 272 is arranged at the communication position of the second branch flow groove 24 and the collecting groove 27, the two flow guide columns slow down the flow speed of the cooling liquid in the branch flow groove and prevent the cooling liquid from impacting the side wall of the flow channel plate 2, and the service life of the flow channel plate 2 is improved.

[0039] More preferably, the collecting groove 27 is further provided with a first guide strip 273 and a second guide strip 274, the first guide strip 273 is arranged close to the fourth branch flow groove 26 and is used for guiding the cooling liquid in the fourth branch flow groove 26 to flow forward, and the second guide strip 274 is arranged close to the second branch flow groove 24 and is used for guiding the cooling liquid in the first branch flow groove 23, the second branch flow groove 24 and the third branch flow groove 25 to flow forward and flow out, preventing the cooling liquid from flowing and interfering with each other, so as to reduce the heat dissipation efficiency of the cooling liquid.

[0040] More preferably, the water inlet pipe 11 and the water outlet pipe 12 are arranged on the base plate 1, the water inlet pipe 11 is communicated with the inlet groove 21, the water outlet pipe 12 is communicated with the outlet groove 28, the water inlet pipe 11 and the water outlet pipe 12 penetrate the base plate 1, and the connection mode is detachable, which is convenient for installation.

[0041] More preferably, the first protrusion 13 and the second protrusion 14 are further included, and the first protrusion 13 and the second protrusion 14 are both arranged on the base plate 1, the first protrusion 13 is arranged above the inlet groove 21, the second protrusion 14 is arranged above the outlet groove 28, and the inlet groove 21 and the outlet groove 28 are both on the same side of the flow channel plate 2, and the first protrusion 13 and the second protrusion 14 play a role in covering and strengthening the inlet groove 21 and the outlet groove 28.

[0042] Preferably, the area of the heat dissipation region can be changed by adjusting the transverse length of the four branch grooves and the collecting groove 27, so as to meet the heat dissipation layout requirements of different numbers of lithium batteries.

[0043] The working process of the liquid cooling plate is as follows:

[0044] The cooling liquid enters the inlet groove 21, is slowed down by the guide strips 221 in the branch grooves 22, and then flows into the first branch groove 23, the second branch groove 24, the third branch groove 25, and the fourth branch groove 26, respectively. The widths and positions of the branch grooves are different, so that the flow rates and flow volumes of the cooling liquid in the branch grooves are different. After the cooling liquid in each branch groove absorbs heat, the cooling liquid enters the collecting groove 27, is guided by the collecting groove 27 to the outlet groove 28, and is discharged outward, thereby completing the heat absorption cycle.

[0045] Embodiment two

[0046] The embodiment also discloses a cooling device, which comprises the liquid cooling plate, the aluminum bars, and the lithium batteries in the battery pack, the lithium batteries are in contact with the liquid cooling plate, and the lithium batteries are connected with the aluminum bars.

[0047] Referring to Figures 5-7 , the simulation is performed on the battery pack formed by the liquid cooling plate with the flow channel structure, 104 square lithium batteries, the matching aluminum bars, the heat insulation sheets, the heat conduction pads, and the end plates, the heat generation power of a single lithium battery is set to 16W, a 50% concentration ethylene glycol solution is used as the cooling liquid, the inlet flow of the liquid cooling plate is set to 9L / min, the inlet temperature is set to 18℃, and the environmental temperature is set to 25℃. The simulation is started to simulate the charging and discharging of the lithium battery for 2h. The simulation result shows that the highest temperature of the eight aluminum bars is 34.5℃, the lowest temperature is 32.38℃, and the temperature difference is 2.12℃. The temperature difference is small, which indicates that the temperature equalization effect of the liquid cooling plate is good, and the liquid cooling plate can be used for uniform heat dissipation of high-density lithium batteries.

[0048] According to the disclosure and teaching of the above description, the skilled in the art of the present application can also change and modify the above embodiments. Therefore, the present application is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present application should also fall within the protection scope of the claims of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the present application.

Claims

1. A liquid cold plate comprising a base plate (1) and a flow channel plate (2) provided on the base plate (1), characterized in that: The flow channel plate (2) is provided with an inlet groove (21), an outlet groove (28), a flow distribution groove (22), a heat conduction area and a flow collection groove (27). One end of the inlet groove (21) is communicated with one end of the flow distribution groove (22), the other end of the flow distribution groove (22) is communicated with the heat conduction area, one end of the flow collection groove (27) is communicated with the outlet groove (28), and the other end of the flow collection groove (27) is communicated with the heat conduction area. A plurality of flow guide strips (221) are arranged in the flow distribution groove (22), and a plurality of the flow guide strips (221) are arranged on one side of the heat conduction area in a vertical direction to the inlet groove (21).

2. The liquid cooling plate of claim 1, wherein: The heat conduction area is provided with a first branch groove (23), a second branch groove (24) and a third branch groove (25) connected in sequence. The distances from the first branch groove (23), the second branch groove (24) and the third branch groove (25) to the inlet groove (21) increase in sequence, the first branch groove (23), the second branch groove (24) and the third branch groove (25) are communicated with the flow distribution groove (22) respectively, and the first branch groove (23) is arranged close to the inlet groove (21).

3. The liquid cooling plate of claim 2, wherein: The widths of the second branch groove (24) and the third branch groove (25) are the same, and the width of the first branch groove (23) is smaller than the width of the second branch groove (24).

4. The liquid cooling plate of claim 2, wherein: The heat conduction area is further provided with a fourth branch groove (26), the fourth branch groove (26) is arranged close to the outlet groove (28), one end of the fourth branch groove (26) is communicated with the third branch groove (25), and the other end of the fourth branch groove (26) is communicated with the flow collection groove (27).

5. The liquid cooling plate of claim 4, wherein: The width of the fourth branch groove (26) is smaller than the width of the first branch groove (23).

6. The liquid cooling plate of claim 5, wherein: The flow collection groove (27) is provided with a first flow guide column (271) and a second flow guide column (272), the first flow guide column (271) is arranged at the communication position of the flow collection groove (27) and the third branch groove (25), and the second flow guide column (272) is arranged at the communication position of the second branch groove (24) and the flow collection groove (27).

7. The liquid cooling plate of claim 6, wherein: The flow collection groove (27) is further provided with a first guide strip (273) and a second guide strip (274), the first guide strip (273) is arranged close to the fourth branch groove (26), and the second guide strip (274) is arranged close to the second branch groove (24).

8. The liquid cooling plate of claim 1, wherein: Further comprising a water inlet pipe (11) and a water outlet pipe (12), the water inlet pipe (11) and the water outlet pipe (12) are arranged on the base plate (1), the water inlet pipe (11) is communicated with the inlet groove (21), and the water outlet pipe (12) is communicated with the outlet groove (28).

9. The liquid cold plate of claim 8, wherein: Further comprising a first protrusion (13) and a second protrusion (14), the first protrusion (13) and the second protrusion (14) are arranged on the base plate (1), the first protrusion (13) is arranged above the inlet groove (21), and the second protrusion (14) is arranged above the outlet groove (28).

10. A battery cooling device, characterized by: The liquid cold plate according to any one of claims 1-9.

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