Water cooling plate

Abstract

The utility model discloses a water cooling plate which comprises a water cooling plate body, a plurality of ribs, a front plug and a rear plug. The water cooling plate main body comprises a first main plate, a second main plate and two side barrier strips, the first main plate and the second main plate are arranged in parallel at an interval, the two side barrier strips are arranged on the two sides of the first main plate respectively, the main plates and the side barrier strips define an inner cavity and two ports communicated with the inner cavity, and the ribs are located in the inner cavity and connected with the first main plate and the second main plate respectively. The ribs extend from one port to the other port, the front plug and the rear plug seal the two ports respectively, and the end points of at least part of adjacent ribs on the same side are located on the same track circle. The end points on the same side of at least part of the adjacent ribs on the water-cooling plate are located on the same track circle, so that all the ribs can be cut by means of a large disc cutter, compared with traditional ribs which are equal in length or arranged in a step mode, the machining efficiency is obviously improved, and compared with a traditional water-cooling plate, the machined water-cooling plate has no obvious difference in heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery cooling technology, and in particular to a water-cooled plate. Background Technology

[0002] Batteries generate heat during charging and discharging. The typical operating range for lithium batteries is below 60℃. Within this range, the performance and lifespan of the battery cells are well-preserved. To provide a good working environment for the cells, the heat generated by the battery needs to be dissipated promptly. The current conventional method is to place the battery cells on a water-cooled plate. The heat generated by the cells is carried away by the coolant in the water-cooled plate and discharged into the air through heat exchange with the water-cooling unit. Currently, water-cooled plates include stamped brazed water-cooled plates, extruded profile water-cooled plates, blown water-cooled plates, and harmonica-shaped plates, among others. Extruded profile water-cooled plates are widely used due to their inexpensive molds and flexible, convenient, and quick manufacturing process.

[0003] Extruded profile water-cooled plates typically contain multiple parallel ribs, with at least some ribs of varying lengths. The ends of adjacent ribs form a stepped shape. In related technologies, multiple adjacent ribs (e.g., four or more) located at the same end are not on the same trajectory circle. Therefore, side milling or multiple side milling heads are usually required for machining. Each rib in the flow channel is machined individually by the side milling head, resulting in low machining efficiency and hindering production efficiency, thus increasing the production cost of the water-cooled plate. Furthermore, the flow channel thickness of profile water-cooled plates is generally very small, around 5-8 mm. When machining flow channels with greater depth, the small diameter and long length of the milling cutter make it prone to breakage during machining, leading to high tool costs.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] To solve one of the above-mentioned technical problems, this utility model provides a water-cooled plate.

[0006] The present invention adopts the following technical solution:

[0007] A water-cooled plate, comprising:

[0008] The water-cooled plate body includes a first main board, a second main board, and two side baffles. The first main board and the second main board are spaced apart and arranged in parallel. The two side baffles are respectively disposed on both sides of the first main board and are connected to the first main board and the second main board. The first main board, the second main board, and the two side baffles enclose an inner cavity and two ports communicating with the inner cavity.

[0009] Multiple ribs are provided, each rib is located within the inner cavity, and each rib is respectively connected to the first motherboard and the second motherboard. Each rib extends from one port to the other port.

[0010] A front plug and a rear plug are respectively located at both ends of the water-cooled plate body and respectively seal the two ports of the water-cooled plate body;

[0011] Among them, at least some of the adjacent ribs have their endpoints on the same side located on the same trajectory circle.

[0012] Optionally, the front plug has an inlet and an outlet communicating with the inner cavity;

[0013] Each of the aforementioned reinforcing bars includes isolation reinforcing bars and diversion reinforcing bars;

[0014] The isolation rib is in contact with the front plug, and the isolation rib and the rear plug have a gap;

[0015] The endpoints of each diversion rib between the isolation rib and the side baffle on one side are located on the first trajectory circle on the side closest to the front plug.

[0016] Optionally, the endpoints of each diversion rib between the isolation rib and the side baffle on the other side are located on the second trajectory circle on the side closest to the front plug.

[0017] Optionally, each endpoint of the ribs on the side closest to the rear plug is located on the third trajectory circle.

[0018] Optionally, the radii of the first trajectory circle, the second trajectory circle, and the third trajectory circle are equal.

[0019] Optionally, the inner cavity has an end insertion cavity on one side of the end of the water-cooled plate body, and the port communicates with the end insertion cavity;

[0020] There is a gap between some of the reinforcing bars and the end cavity;

[0021] Residual ribs are provided on the inner wall of the first main board and / or the second main board between the ribs and the end cavity;

[0022] Both the front plug and the rear plug have an insertion part, which can be inserted into the corresponding end cavity.

[0023] Optionally, in the direction perpendicular to the first motherboard, the extension dimension of the residual rib is smaller than that of the rib strip.

[0024] Optionally, the extension dimension of the residual rib is 0 to 0.25 mm in the direction perpendicular to the first motherboard.

[0025] Optionally, in the direction perpendicular to the first motherboard, the extension dimension of the rib is smaller than the extension dimension of the end cavity.

[0026] Optionally, in the direction perpendicular to the first motherboard, the difference between the extension dimension of the end cavity and the extension dimension of the rib is 0.08mm to 0.12mm.

[0027] The end cavity has a smooth inner surface.

[0028] By adopting the above technical solution, this application has the following beneficial effects:

[0029] The endpoints of at least some adjacent ribs on the water-cooled plate of this application are located on the same trajectory circle, so that each rib can be cut by means of a large disc cutter. Compared with the traditional ribs of equal length or arranged in steps, the processing efficiency is significantly improved, and the heat dissipation efficiency of the processed water-cooled plate is not significantly different from that of the traditional water-cooled plate.

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0032] Figure 1 A perspective view of the water-cooled plate provided in an embodiment of this application;

[0033] Figure 2 A cross-sectional view of a partial structure of a water-cooled plate provided in an embodiment of this application.

[0034] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] Example 1

[0039] like Figure 1 and Figure 2 As shown in the embodiments of this application, the structure of the cooling plate is described in detail. The cooling plate can be applied to a battery module for contact heat exchange with the battery cells of the battery module, and each battery cell is attached to the water-cooling plate 71. The water-cooling plate 71 includes: a water-cooling plate body, multiple ribs, a front end cap 717 and a rear end cap 718. The water-cooling plate body includes a first main plate 711a, a second main plate 711b and two side baffles 712. The first main plate 711a and the second main plate 711b are spaced apart and parallel to each other, that is, the first main plate 711a and the second main plate 711b are arranged sequentially along the thickness direction of the water-cooling plate 71. Two side baffles 7121 are respectively disposed on both sides of the first main board 711a, and the side baffles 712 are respectively connected to the first main board 711a and the second main board 711b. The first main board 711a, the second main board 711b, and the two side baffles enclose an inner cavity 720 and two ports communicating with the inner cavity 720. Each rib is located within the inner cavity 720, and each rib is respectively connected to the first main board 711a and the second main board 711b. The rib extends from one port to the other port. The front plug 717 and the rear plug 718 are respectively disposed at both ends of the water-cooled plate body and respectively close the two ports of the water-cooled plate body. At least some of the endpoints on the same side of adjacent ribs are located on the same trajectory circle. For example, the endpoints on the same side of four, five, or more adjacent ribs are located on the same trajectory circle.

[0040] It should be noted that, as mentioned above, the first motherboard 711a and the second motherboard 711b can both be a single piece of board, or they can both be formed by splicing multiple boards. For example, the first motherboard 711a may include two or more boards, each of which is located in the same plane and adjacent boards are welded together.

[0041] At least some of the adjacent ribs on the water-cooled plate 71 of this application have their endpoints on the same side located on the same trajectory circle, thereby allowing each rib to be cut with a large disc cutter. Compared with traditional ribs of equal length or arranged in steps, this significantly improves processing efficiency and reduces processing time by half. Furthermore, CAE (Computer Aided Engineering) simulation results of the water-cooled plate 71 provided in this application embodiment show no significant difference in performance compared to the original stepped flow channel, meaning that the heat dissipation efficiency is not significantly different from that of the traditional water-cooled plate 71.

[0042] The structure of the water-cooled plate 71 in this application supports machining with a large disc cutter. Compared with traditional milling cutter machining, machining the ribs in the flow channel with a large disc cutter results in extremely long single-cutter life and no tool breakage, thus reducing the cost of tool use.

[0043] In some possible implementations, the front plug 717 has an inlet and an outlet connecting the inner cavity 720. Each of the ribs includes an isolation rib 715 and a flow-dividing rib 716, which divide the inner cavity 720 into flow channels. The inlet and outlet are respectively connected to the two ends of the flow channels. When the water-cooled plate 71 has only one flow-dividing rib 716, the flow-dividing rib 716 divides the inner cavity 720 into flow channels. Each flow-dividing rib 716 is used to divide the flow channel into multiple sub-flow channels to improve the uniformity of liquid flow.

[0044] The isolation rib 715 contacts the front plug 717, and the isolation rib 715 and the rear plug 718 have a gap. The endpoints of each diversion rib 716 between the isolation rib 715 and the side baffle 712 on one side are located on the first trajectory circle g near the front plug 717. For example, the number of diversion ribs 716 between the isolation rib 715 and the side baffle 712 can be four, five, six, etc., wherein the extension length of each diversion rib 716 decreases progressively from the center to both sides. That is, the endpoint of the diversion rib 716 closer to the corresponding port is closer. The center of the large disc cutter is approximately located on the midline of each diversion rib 716.

[0045] The large disc cutter may include a disc body and a drive shaft. The disc body has protruding teeth along one periphery, and the drive shaft is perpendicularly connected to the center of the disc body. A drive mechanism is connected to the drive shaft and can drive the large disc cutter to rotate at high speed.

[0046] In some possible implementations, the endpoints of the respective diversion ribs 716 between the isolation rib 715 and the side baffle 712 on the other side are located on the second trajectory circle h on the side closest to the front plug 717. That is, the large disc cutter needs to process each diversion rib on both sides of the isolation rib 715 separately in two steps.

[0047] In some possible implementations, the endpoints of each rib on the side near the rear plug 718 are located on the third trajectory circle i. All ribs need to have a gap with the rear plug 718, so the end of each rib near the rear plug 718 can be machined simultaneously by a large disc cutter, machining each rib into place in one go.

[0048] In some possible implementations, the radii of the first trajectory circle g, the second trajectory circle h, and the third trajectory circle i are equal. That is, the same large disc cutter is used for all three cutting of the ribs, eliminating the need to change the large disc end with different outer diameters, reducing the number of processes, and further improving processing efficiency.

[0049] In some possible implementations, the inner cavity 720 has an end cavity 719 on one side of the end of the water-cooled plate body, the port communicates with the end cavity 719, there is a gap between a portion of the rib and the end cavity 719, a residual rib 730 is provided on the inner wall of the first main board 711a between the rib and the end cavity 719, and both the front plug 717 and the rear plug 718 have an insertion part that can be inserted into the corresponding end cavity 719.

[0050] By forming a residual rib 730 between the rib and the end cavity 719, the residual rib 730 can act as a reinforcing rib, which helps to improve the strength of the water-cooled plate 71 and reduce the deformation of the first main plate 711a and the second main plate 711b of the water-cooled plate 71.

[0051] In some possible implementations, the extension dimension of the residual rib 730 is smaller than that of the rib in the direction perpendicular to the first main board 711a. The extension dimension of the residual rib 730 in the direction perpendicular to the first main board 711a is 0–0.25 mm. The residual rib 730 is formed by cutting the rib into the inner cavity 720 of the water-cooling plate body using a large disc cutter. After the rib is cut, its size decreases. Because the location of the residual rib 730 does not affect the installation of the plug, the smaller size of the residual rib 730 will not affect the installation of the plug and will not cause leakage from the water-cooling plate 71.

[0052] Specifically, the thickness of the large disc cutter can be about 0.5 to 1 mm smaller than the thickness (or height) of the inner cavity 720. The machined flow channel will have about 0.2 mm of residual rib 730 on one side, which can improve the strength of the flow channel plate and reduce the deformation of the upper and lower parts of the flow channel plate.

[0053] In some possible implementations, the extension dimension of the rib is smaller than the extension dimension of the end cavity 719 in the direction perpendicular to the first main board 711a. The difference between the extension dimension of the end cavity 719 and the extension dimension of the rib in the direction perpendicular to the first main board 711a is 0.08mm to 0.12mm, meaning the thickness difference between the end cavity 719 and the middle position of the inner cavity 720 is 0.08mm to 0.12mm. The end cavity 719 can be formed by machining with a small disc cutter, the thickness of which is approximately 0.1mm greater than the height (thickness) of the inner cavity 720. The residual rib 730 at the flow channel plate matching point can be completely removed, resulting in a smooth inner surface for the end cavity 719. After the plug is inserted into the end cavity 719, the plug and the inner wall of the end cavity 719 have a tight surface-to-surface fit, preventing stress concentration caused by the residual rib 730 remaining in the end cavity 719 and thus avoiding coolant leakage.

[0054] It should be noted that one port of the water-cooled plate 71 is the front port 713 and the other is the rear port 714. The front plug 717 and the rear plug 718 are respectively located at both ends of the water-cooled plate body and respectively close the front port 713 and the rear port 714 of the water-cooled plate body. At least some of the adjacent ribs have their endpoints on the same side on the same trajectory circle.

[0055] This application embodiment also provides a method for processing the water-cooled plate 71 of the battery box assembly, including: controlling a large disc cutter to extend into the inner cavity 720 to cut each of the ribs, such that the endpoints of at least some of the ribs are located on the same trajectory circle.

[0056] Optionally, the processing method of the water-cooled plate 71 includes:

[0057] The step of controlling the large disc cutter to extend from the front port 713 into the inner cavity 720 to cut each of the ribs, such that at least some of the adjacent ribs are located on the same trajectory circle near the endpoints of the front port 713.

[0058] The step of controlling the large disc cutter to extend from the rear port 714 into the inner cavity 720 to cut each of the ribs, such that at least some of the adjacent ribs have their endpoints near the rear port 714 on the same trajectory circle.

[0059] It should be noted that the two steps mentioned above are not sequential.

[0060] like Figure 1As shown, optionally, the step of controlling the large disc cutter to extend from the front port 713 into the inner cavity 720 to cut each of the ribs, so that at least some of the adjacent ribs have their endpoints near the front port 713 on the same trajectory circle, includes: first controlling the large disc cutter to extend from the front port 713 into the inner cavity 720 to cut each of the diversion ribs 716 on one side of the isolation rib 715, so that the corresponding endpoints of each of the diversion ribs 716 on one side of the isolation rib 715 are located on the first trajectory circle g; then controlling the large disc cutter to extend from the front port 713 into the inner cavity 720 to cut each of the diversion ribs 716 on the other side of the isolation rib 715, so that the corresponding endpoints of each of the diversion ribs 716 on the other side of the isolation rib 715 are located on the second trajectory circle h;

[0061] The step of controlling the large disc cutter to extend from the rear port 714 into the inner cavity 720 and cut each of the ribs, such that at least some of the adjacent ribs have their endpoints near the rear port 714 on the same trajectory circle, includes: controlling the large disc cutter to extend from the rear port 714 into the inner cavity 720 and cut the isolation ribs 715 and each diversion rib 716, such that the endpoints of the corresponding sides of the isolation ribs 715 and each diversion rib 716 are located on the third trajectory circle i. The isolation rib 715 is cut to the greatest length.

[0062] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A water-cooled plate, characterized in that, include: The water-cooled plate body includes a first main board, a second main board, and two side baffles. The first main board and the second main board are spaced apart and arranged in parallel. The two side baffles are respectively disposed on both sides of the first main board and are connected to the first main board and the second main board. The first main board, the second main board, and the two side baffles enclose an inner cavity and two ports communicating with the inner cavity. Multiple ribs are provided, each rib is located within the inner cavity, and each rib is respectively connected to the first motherboard and the second motherboard. Each rib extends from one port to the other port. A front plug and a rear plug are respectively located at both ends of the water-cooled plate body and respectively seal the two ports of the water-cooled plate body; Among them, at least some of the adjacent ribs have their endpoints on the same side located on the same trajectory circle.

2. The water-cooled plate according to claim 1, characterized in that, The front plug has an inlet and an outlet that communicate with the inner cavity; Each of the aforementioned reinforcing bars includes isolation reinforcing bars and diversion reinforcing bars; The isolation rib is in contact with the front plug, and the isolation rib and the rear plug have a gap; The endpoints of each diversion rib between the isolation rib and the side baffle on one side are located on the first trajectory circle on the side closest to the front plug.

3. The water-cooled plate according to claim 2, characterized in that, The endpoints of each diversion rib between the isolation rib and the side baffle on the other side are located on the second trajectory circle on the side closest to the front plug.

4. The water-cooled plate according to claim 3, characterized in that, Each endpoint of the ribs located on the side of the rear plug is situated on the third trajectory circle.

5. The water-cooled plate according to claim 4, characterized in that, The radii of the first trajectory circle, the second trajectory circle, and the third trajectory circle are equal.

6. The water-cooled plate according to claim 1, characterized in that, The inner cavity has an end insertion cavity on one side of the end of the water-cooled plate body, and the port communicates with the end insertion cavity; There is a gap between some of the reinforcing bars and the end cavity; Residual ribs are provided on the inner wall of the first main board and / or the second main board between the ribs and the end cavity; Both the front plug and the rear plug have an insertion part, which can be inserted into the corresponding end cavity.

7. The water-cooled plate according to claim 6, characterized in that, In the direction perpendicular to the first main board, the extension dimension of the residual rib is smaller than that of the rib strip.

8. The water-cooled plate according to claim 7, characterized in that, The extension dimension of the residual rib is 0 to 0.25 mm in the direction perpendicular to the first main board.

9. The water-cooled plate according to claim 6, characterized in that, In the direction perpendicular to the first motherboard, the extension dimension of the rib is smaller than the extension dimension of the end cavity.

10. The water-cooled plate according to claim 9, characterized in that, In the direction perpendicular to the first motherboard, the difference between the extension dimension of the end cavity and the extension dimension of the rib is 0.08mm to 0.12mm; The end cavity has a smooth inner surface.

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