Assembled and welded liquid cooling plate

Abstract

The utility model discloses an assembled and welded liquid cooling plate, parts are split and manufactured independently, the whole liquid cooling plate is assembled and welded, the manufacturing cost is low, and the model can be changed quickly. A liquid inlet hole and a liquid outlet hole which are transversely formed at an interval are formed in one end of the upper cover plate in the length direction; the plurality of groups of runner plates are strip-shaped plates; a liquid inlet runner, a liquid outlet runner, a first runner cavity, a second runner cavity and a communicating cavity are formed in a plate body of the cavity plate, the runner cavity located in the center area is divided into the first runner cavity, the second runner cavity and the communicating cavity through dividing strips, and the tail end of the first runner cavity is communicated with the starting end of the second runner cavity through the communicating cavity. The liquid inlet flow channel is communicated with the starting end of the first flow channel cavity, and the tail end of the second flow channel cavity is communicated with the liquid outlet flow channel; and a lower cover plate.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation structures, in particular to an assembled and welded liquid cooling plate. Background Art

[0002] At this stage, new energy vehicles are developing rapidly. The most critical component of new energy vehicles is lithium batteries. During the charging and discharging process, lithium batteries will generate a lot of heat. Too high temperature will reduce the battery life and there is a risk of thermal runaway such as fire and explosion. Too low temperature will lead to reduced battery capacity, reduced charging and discharging efficiency and further cause short circuit. Therefore, liquid cooling plate has become an important component in the battery cooling system of new energy vehicles and an important part of the thermal management system.

[0003] Working principle: A flow channel is formed in the metal plate, and the electronic components are installed on the surface of the metal plate. The coolant enters from the inlet, passes through the flow channel, and then flows out from the outlet, thereby taking away the heat generated by the components.

[0004] In general, the liquid cooling plate uses circulating coolant to remove excess heat to achieve the purpose of cooling, thereby extending the service life of the battery and ensuring the operating safety of the battery pack.

[0005] However, existing liquid cooling plates, especially large-sized liquid cooling plates, are all manufactured through molding, which leads to high production costs for the entire liquid cooling plate. In addition, due to the rapid replacement of new energy vehicles, the matching liquid cooling plates are frequently replaced. Therefore, it is urgent to develop a liquid cooling plate structure with relatively low production cost and rapid replacement. Summary of the invention

[0006] In view of the above problems, the utility model provides an assembled and welded liquid cooling plate, which separates the components into independent parts and assembles and welds them into an integral liquid cooling plate. The production cost is low and the model can be changed quickly.

[0007] An assembled and welded liquid cooling plate, characterized in that it comprises:

[0008] An upper cover plate, one end of which in the length direction is provided with a liquid inlet hole and a liquid outlet hole which are arranged in a transverse interval;

[0009] A plurality of flow channel plates, all of which are long strip plates;

[0010] A cavity plate, on which a liquid inlet channel, a liquid outlet channel, a first channel cavity, a second channel cavity, and a connecting cavity are arranged; a dividing strip divides the channel cavity located in the central area into a first channel cavity, a second channel cavity, and a connecting cavity; the end of the first channel cavity is connected to the starting end of the second channel cavity through the connecting cavity; the liquid inlet channel is connected to the starting end of the first channel cavity; and the end of the second channel cavity is connected to the liquid outlet channel;

[0011] and the lower cover;

[0012] The outer contours of the upper cover plate, the cavity plate and the lower cover plate are arranged in the same manner; the cavity plate is covered on the upper surface of the lower cover plate; a plurality of groups of flow channel plates are respectively arranged in the first flow channel cavity and the second flow channel cavity; the plurality of groups of flow channel plates are arranged in parallel and spaced apart in parallel to the liquid flow direction of the first flow channel cavity and the second flow channel cavity; the thickness of the flow channel plate is equal to the thickness of the cavity plate; the bottom of the flow channel plate is welded to the upper surface of the lower cover plate and positioned; the upper cover plate is covered and fitted to the upper surface of the surface area formed by the combination of the cavity plate and the flow channel plate; the liquid inlet is arranged corresponding to the inlet position of the liquid inlet channel; the liquid inlet is connected to the liquid inlet channel; the liquid outlet is arranged corresponding to the outlet position of the liquid outlet channel; the liquid outlet is connected to the liquid outlet channel.

[0013] It is further characterized by:

[0014] It also includes two groups of water nozzles, which are respectively fixed to the liquid inlet and the liquid outlet and arranged to protrude outwards, and the water nozzles are used to connect to external water inlet and outlet pipes;

[0015] The first flow channel cavity and the second flow channel cavity have the same transverse width, the number of flow channel plates arranged in the first flow channel cavity is the same as the number of flow channel plates arranged in the second flow channel cavity, and the flow channel plates arrange the transverse width areas of the first flow channel cavity and the second flow channel cavity at equal intervals to ensure that the flow of the divided flow channel is uniform and reliable;

[0016] The upper cover plate, the cavity plate and the lower cover plate are provided with a plurality of groups of positioning holes on their surfaces, and the upper cover plate, the cavity plate and the lower cover plate are reliably positioned through the positioning holes by external auxiliary tooling, and welding and assembly operations are performed by brazing;

[0017] The outlet of the liquid inlet channel is located in the middle of the width direction of the first channel cavity, and the outlet of the liquid inlet channel is a flared structure along the liquid flow direction, ensuring that the coolant flows reliably and evenly into the first channel cavity;

[0018] The inlet of the liquid outlet channel is located in the middle of the width direction of the second channel cavity. The inlet of the liquid outlet channel is a closing structure along the flow direction of the liquid, ensuring that the coolant flows out stably and reliably.

[0019] After adopting the above technical scheme, the upper cover plate, several groups of flow plate, cavity plate and lower cover plate are all plate structures, which are independently processed and manufactured through laser technology, which reduces the mold cost, has low processing and production cost and is easy to process; and because they are all independently processed by plates, their external dimensions are not subject to the processing restrictions of molds. During assembly, several groups of flow plate are first positioned to the upper surface of the lower cover plate by laser welding, and then the upper cover plate and cavity plate are assembled and brazed to form an integral liquid cooling plate. After that, the airtightness of the liquid cooling plate is checked. Through airtightness detection, 0.3Mpa air is introduced into the cavity. No bubbles are generated, confirming that the cavity is sealed and there is no risk of leakage. The components are split and manufactured independently, and assembled and welded to form an integral liquid cooling plate. The production cost is low and the mold can be changed quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 This is an exploded view of the utility model;

[0022] Figure 3 This is a top view of the utility model after removing the upper cover plate;

[0023] The names corresponding to the serial numbers in the figure are as follows:

[0024] Positioning hole 1, front protrusion 2;

[0025] The upper cover plate 10 , the liquid inlet hole 11 , the liquid outlet hole 12 , the flow channel plate 20 , the cavity plate 30 , the liquid inlet channel 31 , the discharge port 311 , the liquid outlet channel 32 , the feed port 321 , the first flow channel cavity 33 , the second flow channel cavity 34 , the connecting cavity 35 , the dividing strip 36 , the lower cover plate 40 , and the water nozzle 50 . DETAILED DESCRIPTION

[0026] A liquid cooling plate assembled and welded, see Figure 1-Figure 3 , which includes an upper cover plate 10, a plurality of flow channel plates 20, a cavity plate 30, a lower cover plate 40, and two groups of water nozzles 50;

[0027] The upper cover plate 10 is provided with a liquid inlet 11 and a liquid outlet 12 which are arranged at intervals in a transverse direction at one end in the length direction;

[0028] The flow channel plates 20 are all long strip plates, and both ends of the length direction thereof are arc edge transition structures;

[0029] The plate body of the cavity plate 30 is provided with a liquid inlet channel 31, a liquid outlet channel 32, a first channel cavity 33, a second channel cavity 34, and a connecting cavity 35. The dividing strip 36 divides the channel cavity located in the central area into the first channel cavity 33, the second channel cavity 34, and the connecting cavity 35. The end of the first channel cavity 33 is connected to the starting end of the second channel cavity 34 through the connecting cavity 34. The liquid inlet channel 31 is connected to the starting end of the first channel cavity 33, and the end of the second channel cavity 34 is connected to the liquid outlet channel 32.

[0030] The outer contours of the upper cover plate 10, the cavity plate 30, and the lower cover plate 40 are set to be the same. In a specific implementation, the upper cover plate 10 and the lower cover plate 40 are plates with the same material and thickness;

[0031] The cavity plate 30 is covered on the upper surface of the lower cover plate 40, and several groups of flow channel plates 20 are respectively arranged in the first flow channel cavity 33 and the second flow channel cavity 34. The several groups of flow channel plates 20 are arranged in parallel and spaced apart in parallel to the liquid flow direction of the first flow channel cavity 33 and the second flow channel cavity 34. The thickness of the flow channel plate 20 is equal to the thickness of the cavity plate 30. The bottom of the flow channel plate 20 is welded to the upper surface of the lower cover plate 40 and positioned. The upper cover plate 10 covers and fits the upper surface of the surface area formed by the combination of the cavity plate 30 and the flow channel plate 20. The liquid inlet hole 11 is arranged corresponding to the inlet position of the liquid inlet channel 31, and the liquid inlet hole 11 is connected to the liquid inlet channel 31 below. The liquid outlet hole 12 is arranged corresponding to the outlet position of the liquid outlet channel 32, and the liquid outlet hole 12 is connected to the liquid outlet channel 32 below.

[0032] Two groups of water nozzles 50 are respectively fixed to the liquid inlet 11 and the liquid outlet 12 and arranged to protrude outwards. The water nozzles 50 are used to connect to external water inlet and outlet pipes.

[0033] In a specific implementation, the first flow channel cavity 33 and the second flow channel cavity 34 have the same transverse width, and the number of flow channel plates 20 arranged in the first flow channel cavity 33 and the second flow channel cavity 34 is three. The three flow channel plates 20 divide the transverse width area of ​​the first flow channel cavity 33 and the second flow channel cavity 34 into four equal parts, ensuring that the flow of the divided flow channel is uniform and reliable.

[0034] A plurality of groups of positioning holes 1 are provided on the surface of the upper cover plate 10, the cavity plate 30 and the lower cover plate 40, and the upper cover plate 10, the cavity plate 30 and the lower cover plate 40 are reliably positioned through the positioning holes 1 by external auxiliary tooling, and welding and assembly operations are performed by brazing;

[0035] The outlet 311 of the liquid inlet channel 31 is located in the middle of the first channel cavity 33 in the width direction. The outlet 311 of the liquid inlet channel 31 is an expansion structure along the liquid flow direction, ensuring that the coolant flows reliably and evenly into the first channel cavity 33.

[0036] The inlet 321 of the liquid outlet channel 32 is located in the middle of the second channel cavity 34 in the width direction. The inlet of the liquid outlet channel 32 is a closing structure along the liquid flow direction, ensuring that the coolant flows out stably and reliably.

[0037] In specific implementation, the surface area of ​​the upper cover plate 10, the cavity plate 30, and the lower cover plate 40 is a rectangular structure as a whole. The upper cover plate 10, the cavity plate 30, and the lower cover plate 40 are provided with front protrusions 2 at the positions corresponding to the liquid inlet hole 11 and the liquid outlet hole 12, which ensures convenient removal and placement of the liquid cooling plate and quick identification of the liquid inlet and outlet positions.

[0038] In a specific implementation, the positions of the liquid inlet 11 and the liquid outlet 12 can be interchanged. Similarly, the flow directions of the coolant in the corresponding flow channel cavities are oppositely arranged.

[0039] Several groups of flow channel plates 20 are laser welded to the lower cover plate 40 at the specified position through the positioning fixture to prevent them from shifting. Laser welding ensures that the flow channel plate 20 and the lower cover plate 40 have sufficient adhesion. Under the impact of the cooling medium, the flow channel plate 20 does not move. The water nozzle 50 is welded to the upper cover plate 10 through solder paste, and laser positioning is used to prevent it from moving. The assembled flow channel plate 20 and the lower cover plate 40, the upper cover plate 10 of the assembled water nozzle 50, and the cavity plate 30 are fixed in position through the positioning holes 1 on themselves and the external positioning shaft without position shifting. Flux or welding sheet is added to the corresponding surfaces that are bonded to each other. Through the brazing furnace and welding treatment, the welding sheet or containing sheet is perfectly bonded to the upper cover plate, the lower cover plate, the cavity plate, and the flow channel plate. After cooling, an assembled and welded liquid cooling plate is obtained. The airtightness of the liquid cooling plate is checked. Through the airtightness test, 0.3Mpa air is introduced into the cavity. No bubbles are generated, confirming that the cavity is sealed and there is no risk of leakage.

[0040] Its beneficial effects are as follows:

[0041] 1. It is made by laser technology, which reduces mold costs, has low processing and production costs, and is easy to process;

[0042] 2. The cost of large-size molds over 500mm is high, and there is no suitable machine for stamping. The flow plate and cavity plate of any size can be processed by laser technology without any processing technology restrictions;

[0043] 3. Separate the runner plate, cavity plate and lower cover plate from the original whole bottom plate, and align the holes when assembling them, so that the weight is distributed, which is convenient for manual handling and can effectively prevent the position deviation caused by manual handling, resulting in poor appearance and performance;

[0044] 4. It can better change the direction, flow rate, and pressure difference of the flow channel, increase or decrease the number of flow channel plates, and adjust the position of the flow channel plates, thereby improving the performance of the liquid cooling plate and achieving rapid changeover;

[0045] In summary, this technology reduces the economic cost and production cycle of small-batch production of liquid cooling plates, as well as the performance improvement stage. There is no need to change the shape of the entire upper cover, only the shape, quantity and direction of the flow channel plate need to be adjusted, which greatly shortens the time cost and economic cost of the research and development stage.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An assembled and welded liquid cooling plate, characterized in that: It includes: An upper cover plate, one end of which in the length direction is provided with a liquid inlet hole and a liquid outlet hole which are arranged in a transverse interval; A plurality of flow channel plates, all of which are long strip plates; A cavity plate, on which a liquid inlet channel, a liquid outlet channel, a first channel cavity, a second channel cavity, and a connecting cavity are arranged; a dividing strip divides the channel cavity located in the central area into a first channel cavity, a second channel cavity, and a connecting cavity; the end of the first channel cavity is connected to the starting end of the second channel cavity through the connecting cavity; the liquid inlet channel is connected to the starting end of the first channel cavity; and the end of the second channel cavity is connected to the liquid outlet channel; and the lower cover; The outer contours of the upper cover plate, the cavity plate and the lower cover plate are arranged in the same manner; the cavity plate is covered on the upper surface of the lower cover plate; a plurality of groups of flow channel plates are respectively arranged in the first flow channel cavity and the second flow channel cavity; the plurality of groups of flow channel plates are arranged in parallel and spaced apart in parallel to the liquid flow direction of the first flow channel cavity and the second flow channel cavity; the thickness of the flow channel plate is equal to the thickness of the cavity plate; the bottom of the flow channel plate is welded to the upper surface of the lower cover plate and positioned; the upper cover plate is covered and fitted to the upper surface of the surface area formed by the combination of the cavity plate and the flow channel plate; the liquid inlet is arranged corresponding to the inlet position of the liquid inlet channel; the liquid inlet is connected to the liquid inlet channel; the liquid outlet is arranged corresponding to the outlet position of the liquid outlet channel; the liquid outlet is connected to the liquid outlet channel.

2. The assembled and welded liquid cooling plate according to claim 1, characterized in that: It also includes two groups of water nozzles, which are respectively fixed to the liquid inlet and the liquid outlet and arranged to protrude outwards, and the water nozzles are used to connect to external water inlet and outlet pipes.

3. The assembled and welded liquid cooling plate according to claim 1, characterized in that: The first flow channel cavity and the second flow channel cavity have the same transverse width, the number of flow channel plates arranged in the first flow channel cavity is the same as the number of flow channel plates arranged in the second flow channel cavity, and the flow channel plates arrange the transverse width areas of the first flow channel cavity and the second flow channel cavity at equal intervals.

4. The assembled and welded liquid cooling plate according to claim 1, characterized in that: The upper cover plate, the cavity plate and the lower cover plate are provided with a plurality of groups of positioning holes on their surfaces, and the upper cover plate, the cavity plate and the lower cover plate are reliably positioned through the positioning holes by external auxiliary tooling, and welding and assembly operations are performed by brazing.

5. The assembled and welded liquid cooling plate according to claim 1, characterized in that: The outlet of the liquid inlet channel is located in the middle of the first channel cavity in the width direction, and the outlet of the liquid inlet channel is a flared structure along the liquid flow direction.

6. The assembled and welded liquid cooling plate according to claim 1, characterized in that: The inlet of the liquid outlet channel is located in the middle of the width direction of the second channel cavity, and the inlet of the liquid outlet channel is a closing structure along the flow direction of the liquid.

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