Stamping plate type water cooling plate with built-in splicing flow channels

Abstract

The utility model relates to the field of water-cooling plates, in particular to a stamping plate type water-cooling plate with built-in spliced runners, which comprises a plurality of water-cooling plates for contacting with a battery cell to dissipate heat, fluid regions for circulation of cooling liquid are formed on the water-cooling plates through stamping, and adjacent water-cooling plates are covered to enable the fluid regions to be communicated and closed to enable the cooling liquid to flow. A connecting port communicated with the fluid domain is formed in the water cooling plate in a penetrating manner, and the water cooling plate is clamped between adjacent battery cells. The battery cell has the effects of improving the heat exchange effect and improving the heat dissipation effect of the battery cell.

Description

Technical Field

[0001] This application relates to the field of water-cooled plates, and in particular to a stamping plate-type water-cooled plate with an internal spliced flow channel. Background Technique

[0002] As the core of new energy vehicles, the battery pack contains multiple battery cells. As an irreplaceable core, the investment in research and development continues to increase. The battery pack has a direct impact on the performance of the vehicle. However, due to the problems that the higher the energy density of the battery pack, the worse the heat dissipation performance, and it is greatly affected by temperature, the application and promotion of new energy vehicles are affected. Therefore, the research on the heat dissipation performance of the battery pack, the research on the safety of the battery pack, and the research on the optimization of the internal heat management system of the battery pack are of great significance.

[0003] As an important component of the internal heat management system of the battery pack, in the existing CTP high-efficiency grouping technology of the battery pack, the stamping water-cooled plate acts as a whole on multiple battery modules. It is a stamping water-cooled plate arranged at the bottom of the battery pack and connected to the box body by bolts. Although it improves the volume utilization rate of the battery pack, reduces the weight and cost pressure of the battery pack, however, since the water-cooled plate is integrally connected to the box body, it is difficult to ensure both the sealing stability and the overall strength. Only the lower water-cooled plate has a stamping flow channel design. After brazing, the internal volume of the flow channel is limited, and the heat exchange effect is not particularly ideal. Moreover, due to the influence of the bolt position, the internal flow channel design is restricted. Utility Model Content

[0004] In order to improve the problem of unsatisfactory heat exchange effect, this application provides a stamping plate-type water-cooled plate with an internal spliced flow channel.

[0005] A stamping plate-type water-cooled plate with an internal spliced flow channel provided by this application adopts the following technical solution:

[0006] A stamping plate-type water-cooled plate with an internal spliced flow channel includes multiple water-cooled plates for contacting and dissipating heat with the battery cells. A fluid domain for the coolant to flow through is formed by stamping on the water-cooled plate. Adjacent water-cooled plates are covered to connect and seal the fluid domain for the coolant to flow. A connection port for communicating with the fluid domain is penetrated and opened on the water-cooled plate. The water-cooled plate is clamped between adjacent battery cells.

[0007] By adopting the above technical solution, the water-cooling plate is placed between adjacent battery cells without being affected by bolt locking, so that the design of the flow channel for guiding the coolant flow reaches the optimal, thereby greatly improving the heat exchange efficiency; and the water-cooling plate adopts a double-sided symmetric coolant channel structure design, enabling the simultaneous cooling of the battery cells on both sides of the water-cooling plate, effectively blocking the abnormal heat conduction between the battery cells, achieving a stronger cooling effect. In this arrangement, each battery cell has two water-cooling plates acting on the cooling effect simultaneously. Compared with the traditional integrated box structure water-cooling plate, the heat exchange area is doubled, greatly improving the cooling rate and being more conducive to the fast charging technology of the battery cells.

[0008] Optionally, a spliced flow channel plate is arranged in the fluid domain, and the spliced flow channel plate and the inner wall of the fluid domain form a flow channel for guiding the flow direction of the coolant.

[0009] By adopting the above technical solution, the flow channel is designed between two water-cooling plates formed by stamping. The spliced flow channel plate and the inner wall of the water-cooling plate form a flow channel for guiding the flow, increasing the volume, improving the proportion of the contact area between the flow channel and the outer wall of the water-cooling plate. At the same time, the spliced flow channel plate also plays a role in supporting, improving the structural strength and reducing the probability of deformation of the water-cooling plate under pressure.

[0010] Optionally, the spliced flow channel plate includes a partition plate. The partition plate divides the fluid domain into a liquid inlet area and a liquid outlet area. The connection ports exist in both the liquid inlet area and the liquid outlet area. A partition flow channel for the coolant to pass through is formed between the end of the partition plate and the inner wall of the fluid domain. The partition flow channel connects the liquid inlet area and the liquid outlet area, and the partition flow channel is located at a position far from the connection port.

[0011] By adopting the above technical solution, the connection port for inlet coolant and the connection port for outlet coolant are separated by the partition plate, reducing the probability that the coolant just enters from the connection port and directly flows straight into another connection port and is discharged, resulting in the coolant not flowing in the water-cooling plate to carry away heat, and enabling the coolant to fully flow in the fluid domain to carry away heat.

[0012] Optionally, the spliced flow channel plate includes a main flow channel plate. The flow channel includes a plurality of main flow channels. The plurality of main flow channels are formed on the main flow channel plate and guide the flow direction of the coolant. The main flow channels point to the partition flow channel.

[0013] By adopting the above technical solution, the flow direction of the coolant is guided, making the flow of the coolant in the water-cooling plate smoother, reducing the probability that the coolant flows and impacts each other in the water-cooling plate, thereby affecting the flow rate, and improving the water-cooling effect.

[0014] Optionally, the extension length of the main flow channel closer to the edge of the water-cooling plate is shorter.

[0015] By adopting the above technical solution, the outermost main flow channel is designed to be shorter, allowing more coolant to pass through the outer side, enhancing the heat dissipation effect at the outer position of the battery cell, reducing the temperature at the outer side of the battery cell, so that the temperature inside the battery cell can be dissipated outward faster, making the temperature of the battery cell more balanced and the heat dissipation effect stronger, achieving the effect of maintaining the temperature.

[0016] Optionally, the spliced flow channel plate includes a turning flow channel plate, and the flow channel includes a first guiding flow channel formed on the turning flow channel plate. The extending direction of the first guiding flow channel points from the opening of the main flow channel to the dividing flow channel, and the extending direction of the main flow channel faces the first guiding flow channel.

[0017] By adopting the above technical solution, the coolant in the main flow channel is guided into the dividing flow channel through the first guiding flow channel, which is achieved by dividing the guiding into two sections. This reduces the probability of strong impact and large reverse impact when a large change in the coolant flow direction occurs in one section of the guiding, affecting the flow rate, making the process of guiding the change in flow direction smoother, and improving the water cooling effect.

[0018] Optionally, the flow channel includes a second guiding flow channel formed on the turning flow channel plate. The extending direction of the second guiding flow channel points to the dividing flow channel. A first diversion hole is formed through the side wall of the first guiding flow channel, and the first diversion hole faces the second guiding flow channel. The opening of the first diversion hole faces the opening of the main flow channel away from the dividing flow channel.

[0019] By adopting the above technical solution, part of the coolant is diverted to the second guiding flow channel through the first diversion hole to change the flow direction, reducing the probability that a large amount of coolant is guided through the first guiding flow channel, resulting in excessive coolant accumulation on the first guiding flow channel and affecting the flow rate, making the flow of the coolant smoother, and improving the water cooling effect.

[0020] Optionally, adjacent openings of the main flow channel are distributed along the extending direction of the first guiding flow channel.

[0021] By adopting the above technical solution, the space utilization rate is improved, enabling the coolant flowing out of the opening of the main flow channel to directly contact the first guiding flow channel, reducing the probability that the coolant flowing out of the opening of the main flow channel first stays in the fluid domain and flows a certain distance without being guided and then contacts the first guiding flow channel, resulting in deviation, making the flow smoother.

[0022] Optionally, a second diversion hole is formed in the side wall of the second guiding flow channel, and the second diversion hole penetrates from the corner of the fluid domain towards the dividing flow channel.

[0023] By adopting the above technical solution, the coolant flowing out from the corners of the fluid domain is shunted through the second shunt hole, reducing the probability that the small space for the coolant to pass between the inclined turning flow channel plate and the side wall of the fluid domain, and there is a lot of coolant at the corners, resulting in accumulation and affecting the flow rate. This makes the flow of the coolant smoother and improves the water cooling effect.

[0024] Optionally, a guiding arc angle is formed at the inner wall corner of the fluid domain, and the guiding arc angle points to the separation flow channel and the second shunt hole.

[0025] By adopting the above technical solution, the coolant impacting at the inner wall corner of the fluid domain is guided to turn more smoothly through the guiding arc angle, reducing the impact.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Cooling the battery cells on both sides of the water cooling plate simultaneously, and effectively blocking the abnormal heat conduction between the battery cells, achieving a stronger cooling effect, greatly improving the cooling rate, and being more conducive to the fast charging technology of the battery cells.

[0028] 2. Placing the water cooling plate between adjacent battery cells, not affected by bolt locking, so that the design of the flow channel reaches the optimum, and greatly improving the heat exchange efficiency.

[0029] 3. Improving the structural strength and reducing the probability of deformation of the water cooling plate under pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an overall structural schematic diagram of a stamping plate type water cooling plate with an internal splicing flow channel in an embodiment of the present application.

[0031] Figure 2 is an exploded structural schematic diagram highlighting the flow channel.

[0032] Figure 3 is an exploded structural schematic diagram highlighting the splicing flow channel plate.

[0033] Figure 4 is a structural schematic diagram highlighting the flow path of the coolant.

[0034] Description of the reference numerals: 1, water cooling plate; 11, fluid domain; 111, liquid inlet area; 112, liquid outlet area; 12, connection port; 13, flow channel; 2, splicing flow channel plate; 21, partition plate; 22, main flow channel plate; 23, turning flow channel plate; 3, separation flow channel; 31, main flow channel; 32, first guiding flow channel; 33, second guiding flow channel; 34, first shunt hole; 35, second shunt hole; 36, guiding arc angle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following is combined with the attachedFigures 1-4 Further details of this application will be described below.

[0036] An embodiment of this application discloses a stamping plate - type water - cooled plate with an internal spliced flow channel. Referring to Figure 1 and Figure 2 , the stamping plate - type water - cooled plate with an internal spliced flow channel includes a plurality of water - cooled plates 1 for contacting the battery cells to dissipate heat. Every two water - cooled plates 1 form a group. A fluid domain 11 for the coolant to flow through is stamped on the water - cooled plate 1. The two water - cooled plates 1 in the same group are covered so that the two fluid domains 11 form a complete space for the coolant to flow. A connection port 12 for communicating with the fluid domain 11 is penetrated through the water - cooled plate 1. The connection port 12 is located at the corner of the fluid domain 11. One of the connection ports 12 on the two water - cooled plates 1 is for the coolant to enter, and the other is for the coolant to discharge. A group of water - cooled plates 1 is clamped between adjacent battery cells, that is, they are arranged in the pattern of battery cell, a group of water - cooled plates 1, battery cell, a group of water - cooled plates 1.

[0037] Referring to Figure 2 and Figure 3 and Figure 4 , a spliced flow - channel plate 2 is installed in the fluid domain 11. The spliced flow - channel plate 2 is first positioned by spot welding and then fixed by brazing. The spliced flow - channel plate 2 and the inner wall of the fluid domain 11 form a flow channel 13 for guiding the flow direction of the coolant. Through the flow channel 13, the coolant is guided to enter the fluid domain 11 from one connection port 12, and then discharged from the other connection port 12 after circulating in a circle. The spliced flow - channel plate 2 includes a partition plate 21. The partition plate 21 is located at the central axis position, that is, the two water - cooled plates 1 in the same group are centrosymmetric with the partition plate 21 as the central axis to realize the covering of the fluid domain 11. The partition plate 21 is in the middle position between the two connection ports 12. The partition plate 21 evenly divides the fluid domain 11 into a liquid - inlet area 111 and a liquid - outlet area 112. There are connection ports 12 in both the liquid - inlet area 111 and the liquid - outlet area 112. The connection port 12 in the liquid - inlet area 111 is for the coolant to enter, and the connection port 12 in the liquid - outlet area 112 is for discharging the coolant. The end of the partition plate 21 close to the connection port 12 is hermetically connected to the inner wall of the fluid domain 11. Here, it is sealed by solder, that is, the solder is placed between the partition plate 21 and the inner wall of the fluid domain 11, and the solder is placed between the two water - cooled plates 1. Then, when entering the brazing furnace for brazing, the molten solder fills and seals the gap between the partition plate 21 and the fluid domain 11. A partition flow channel 3 for the coolant to pass through is formed between the end of the partition plate 21 far from the connection port 12 and the inner wall of the fluid domain 11 far from the connection port 12. The partition flow channel 3 is in the middle of the liquid - inlet area 111 and the liquid - outlet area 112, and the partition flow channel 3 connects the liquid - inlet area 111 and the liquid - outlet area 112.

[0038] Referring to Figure 2 and Figure 3 and Figure 4, the spliced flow channel plate 2 includes two main flow channel plates 22 which are respectively installed in the liquid inlet area 111 and the liquid outlet area 112, and the two main flow channel plates 22 are symmetric with the partition plate 21 as the axis of symmetry. The flow channel 13 includes a plurality of main flow channels 31 which are formed on the main flow channel plate 22. The main flow channel plate 22 is trapezoidal, with the longer side as the lower base, the shorter side as the upper base, and two waist sides. The lower base of the main flow channel plate 22 is located close to the partition plate 21, the upper base is located away from the partition plate 21, and both the lower base and the upper base are parallel to the extension direction of the partition plate 21. The connection port 12 is located close to the upper base. The trapezoid of the main flow channel plate 22 is approximately an isosceles trapezoid, that is, the two waist sides are inclined, connecting from the end of the lower base to the end of the upper base. The midpoint connection line of the upper base and the lower base forms a median line, and the waist side extends obliquely in the direction closer to the median line as it is farther away from the partition plate 21. The main flow channel 31 is formed by stamping the main flow channel plate 22. The extension direction of the main flow channel 31 is parallel to the lower base of the main flow channel plate 22, that is, it extends from one waist side to the other waist side. The extension length of the main flow channel 31 is equal to the distance between the two waist sides, that is, the closer the main flow channel 31 is to the upper base of the main flow channel plate 22, the shorter the extension length, so as to guide the flow direction of the coolant.

[0039] Refer to Figure 2 And Figure 3 And Figure 4 , the spliced flow channel plate 2 includes two turning flow channel plates 23. The two turning flow channel plates 23 correspond one by one to the two spliced flow channel plates 2, that is, one turning flow channel plate 23 and one spliced flow channel plate 2 correspond to one liquid inlet area 111 or one liquid outlet area 112. The flow channel 13 includes a first guiding flow channel 32 formed on the turning flow channel plate 23. The extension direction of the side wall of the first guiding flow channel 32 is parallel to the waist side of the main flow channel plate 22 close to the partition flow channel 3, that is, the opening distribution direction of the plurality of main flow channels 31 is parallel to the extension direction of the side wall of the first guiding flow channel 32, and the extension direction of the first guiding flow channel 32 points to the partition flow channel 3.

[0040] Refer to Figure 2 And Figure 3 And Figure 4, the flow channel 13 includes a second guiding flow channel 33 formed on the turning flow channel plate 23. The second guiding flow channel 33 is located at a position away from the main flow channel plate 22 with respect to the first guiding flow channel 32, that is, the first guiding flow channel 32 is between the second guiding flow channel 33 and the main flow channel plate 22. The extending direction of the second guiding flow channel 33 is parallel to the extending direction of the first guiding flow channel 32, and the extending direction of the second guiding flow channel 33 points to the dividing flow channel 3. A first diversion hole 34 is formed through the side wall of the first guiding flow channel 32. The opening of the first diversion hole 34 faces the second guiding flow channel 33, and the opening of the first diversion hole 34 facing away from the dividing flow channel 3 is an opening facing the main flow channel 31. The first diversion hole 34 is formed at a position of the first guiding flow channel 32 away from the dividing flow channel 3. For example, four main flow channels 31 are formed on the main flow channel plate 22. The first main flow channel 31 is the closest to the dividing plate 21 and then gradually moves away in sequence. The fourth main flow channel 31 is the farthest from the dividing plate 21. The first main flow channel 31 and the second main flow channel 31 directly face the side wall of the first guiding flow channel 32, while a first diversion hole 34 is formed on the side wall of the first guiding flow channel 32 facing the third main flow channel 31, so that the coolant in the third main flow channel 31 flows through the first diversion hole 34 to the second guiding flow channel 33.

[0041] Refer to Figure 2 With Figure 3 With Figure 4 , a second diversion hole 35 is formed on the side wall of the second guiding flow channel 33. The second diversion hole 35 is formed at a position of the second guiding flow channel 33 close to the dividing flow channel 3. A guiding arc angle 36 is formed at the inner wall corner of the fluid domain 11, that is, the inner wall of the fluid domain 11 is usually connected to the adjacent inner wall by the guiding arc angle 36. The coolant in the fourth main flow channel 31 will flow to the corner of the fluid domain 11 and then flow to the second diversion hole 35 or directly to the dividing flow channel 3 under the guidance of the guiding arc angle 36. The guiding arc angle 36 points to the dividing flow channel 3 and the second diversion hole 35.

[0042] The implementation principle of a stamping plate - type water - cooled plate with an internal splicing flow channel in an embodiment of this application is as follows: When cooling the battery cell, the coolant enters the liquid inlet area 111 from the connection port 12. Under the action of the partition plate 21, the coolant in the liquid inlet area 111 can only flow into the main flow channel 31, and then flows into the liquid outlet area 112 through the partition flow channel 3, and cannot directly flow into the liquid outlet area 112. The coolant in the first main flow channel 31 and the second main flow channel 31 impacts on the side wall of the first guiding flow channel 32 and flows into the partition flow channel 3 under the inclined guiding action of the first guiding flow channel 32. The coolant in the third main flow channel 31 flows to the first diversion hole 34 and impacts on the side wall of the second guiding flow channel 33, and then flows into the partition flow channel 3 under the inclined action of the second guiding flow channel 33. The coolant in the fourth main flow channel 31 flows to the corner of the liquid inlet area 111 and fills it, and then flows into the partition flow channel 3 under the turning and guiding action of the guiding arc angle 36. Some coolant will also first penetrate into the second diversion hole 35 and then enter the partition flow channel 3;

[0043] For the coolant flowing out of the partition flow channel 3, part of it impacts on the side wall of the second guiding flow channel 33 in the liquid outlet area 112, and part of it impacts on the guiding arc angle 36 at the corner of the liquid outlet area 112. Thus, through the guiding of the second guiding flow channel 33, the diversion and yielding of the first diversion hole 34 and the second diversion hole 35, and the guiding of the guiding arc angle 36, the coolant enters the main flow channel 31 in the liquid outlet area 112 and is then discharged from the connection port 12 in the liquid outlet area 112.

[0044] The above are all preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A stamping plate type water cooling plate with an internal splicing flow channel, characterized in that: It includes a plurality of water-cooling plates (1) for contacting and dissipating heat from the battery cells. A fluid domain (11) for the circulation of the coolant is formed by stamping on the water-cooling plate (1). Adjacent water-cooling plates (1) are covered to connect and enclose the fluid domain (11) for the flow of the coolant. A connection port (12) for communicating with the fluid domain (11) is formed through the water-cooling plate (1). The water-cooling plate (1) is clamped between adjacent battery cells.

2. The stamping plate water-cooled plate with an internal splicing flow channel according to claim 1, wherein: A spliced flow channel plate (2) is arranged in the fluid domain (11). The spliced flow channel plate (2) and the inner wall of the fluid domain (11) form a flow channel (13) for guiding the flow direction of the coolant.

3. The stamping plate water-cooled plate with an internal splicing flow channel according to claim 2, wherein: The spliced flow channel plate (2) includes a partition plate (21). The partition plate (21) divides the fluid domain (11) into a liquid inlet area (111) and a liquid outlet area (112). The connection ports (12) exist in both the liquid inlet area (111) and the liquid outlet area (112). A partition flow channel (3) for the coolant to pass through is formed between the end of the partition plate (21) and the inner wall of the fluid domain (11). The partition flow channel (3) connects the liquid inlet area (111) and the liquid outlet area (112). The partition flow channel (3) is located at a position far from the connection port (12).

4. The stamping plate type water cooling plate with an internal splicing flow channel according to claim 3, characterized in that: The spliced flow channel plate (2) includes a main flow channel plate (22). The flow channel (13) includes a plurality of main flow channels (31). The plurality of main flow channels (31) are formed on the main flow channel plate (22) and guide the flow direction of the coolant. The main flow channel (31) points to the partition flow channel (3).

5. The stamping plate type water cooling plate with an internal splicing flow channel according to claim 4, characterized in that: The extension length of the main flow channel (31) closer to the edge of the water-cooling plate (1) is shorter.

6. The stamped plate - type water - cooled plate with an internal splicing flow channel according to claim 4, characterized in that: The spliced flow channel plate (2) includes a turning flow channel plate (23). The flow channel (13) includes a first guiding flow channel (32) formed on the turning flow channel plate (23). The extension direction of the first guiding flow channel (32) points from the opening of the main flow channel (31) to the partition flow channel (3). The extension direction of the main flow channel (31) faces the first guiding flow channel (32).

7. The stamping plate type water cooling plate with an internal splicing flow channel according to claim 6, characterized in that: The flow channel (13) includes a second guiding flow channel (33) formed on the turning flow channel plate (23). The extension direction of the second guiding flow channel (33) points to the partition flow channel (3). A first diversion hole (34) is formed through the side wall of the first guiding flow channel (32). The first diversion hole (34) faces the second guiding flow channel (33). The opening of the first diversion hole (34) faces the opening of the main flow channel (31) away from the partition flow channel (3).

8. The stamping plate water-cooling plate with an internal splicing flow channel according to claim 6, characterized in that: The openings of adjacent main flow channels (31) are distributed along the extension direction of the first guiding flow channel (32).

9. The stamping plate water-cooled plate with an internal splicing flow channel according to claim 7, characterized in that: A second diversion hole (35) is formed on the side wall of the second guiding flow channel (33). The second diversion hole (35) is formed through from the corner of the fluid domain (11) to the partition flow channel (3).

10. The stamping plate type water-cooled plate with an internal splicing flow channel according to claim 9, characterized in that: A guiding arc angle (36) is formed at the inner wall corner of the fluid domain (11). The guiding arc angle (36) points to the partition flow channel (3) and the second diversion hole (35).

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