TWM649601U - Large area uniform temperature liquid cooling plate - Google Patents

Abstract

The present invention provides a large-area uniform temperature liquid-cooling plate. The flow channel inlet is arranged on the side of the liquid-cooling plate body close to the center line, and continues to extend toward the center of the liquid-cooling plate body, and is then bent sequentially. , after moving away from the center line along this side, after going around the periphery of the liquid cooling plate body, the flow channel outlet is formed adjacent to the flow channel inlet and closer to the edge. Therefore, the flow channel inlet is closer to the flow channel outlet. The design of the center line, combined with the bending of the flow channels in each section, allows for heat exchange to achieve better temperature uniformity of the entire liquid cooling plate.

Description

Large area uniform temperature liquid cooling plate

The invention relates to a liquid cooling plate, in particular to a thin, large-area liquid cooling plate that can achieve uniform temperature effects.

In response to the booming development of the new energy vehicle market, power batteries are one of the three core technologies of new energy electric vehicles. The single energy density of soft-packed batteries in power batteries has greater potential than cylindrical or prismatic batteries; however, soft-packed batteries Thermal management of the core is more difficult. Currently, the common ones can be divided into two categories: indirect contact conduction and direct contact conduction.

In terms of indirect contact conduction, the thermal conductive sheet is mainly used to contact the surface of the battery core, and the heat of the battery core is conducted to the side, and then a liquid cooling device is used to take the heat away; while direct contact conduction is through a small liquid cooling plate and the battery core. Direct contact to directly take away the heat from the battery core. Although the direct contact conduction method has higher thermal management efficiency, because the size of the current battery core is not large, it has a limited impact on the performance of the battery core. The indirect contact conduction method can have a higher energy density, so currently The indirect contact transmission method is the mainstream.

However, as power batteries increase the size and capacity of soft-packed cells in order to improve mileage and volume utilization, it will be difficult to control the temperature to an ideal state if heat is dissipated through indirect contact conduction. On the other hand, in the existing design of liquid cooling plates with direct contact conduction, due to the small size of the battery cells, the flow channel design is relatively simple and only considers whether there are flow channels. However, when applied to larger-sized cells, there will be significant temperature differences between a single cell and between cells. The main reason is that the temperature difference between the center and the edge of the battery core will increase as the size of the battery core increases, making it difficult to achieve effective thermal management efficiency; in addition, soft-packed battery cores form modules. or battery pack, the heat accumulated near the center of the module or battery pack is not easy to dissipate, which will also cause the temperature in the center of the module or battery pack to be higher, thus affecting the electrical performance and service life of the power battery pack.

Based on the shortcomings of the above-mentioned existing technologies, this creation proposes a large-area uniform temperature liquid cooling plate to effectively solve the above problems.

The main purpose of this new model is to provide a large-area uniform temperature liquid cooling plate that uses a special coolant flow channel design to solve the problem of uneven heat dissipation temperature of large-sized battery cells, thereby improving the electrical performance and service life of the power battery pack. Purpose.

This new model proposes a large-area uniform temperature liquid cooling plate, which includes a liquid cooling plate body and at least one flow channel provided on the liquid cooling plate body. The flow channel has a flow channel inlet and a flow channel outlet. The flow channel inlet is located at the liquid cooling plate body. One side of the plate body is adjacent to the center line of the side, so that the flow channel extends toward the center of the liquid cooling plate body to form a first section, and is then bent through the center line to form a second section. The side forms a third section, the edge is continuously bent toward the side to form a fourth section, the edge is continuously bent away from the side to form a fifth section, the edge is continuously bent through the center line to form a sixth section, and the bending is continued A seventh section is formed toward the side, and the seventh section continues into the outlet of the flow channel and flows out from the other edge of the side of the liquid cooling plate body.

The flow channel inlet is designed to be closer to the center than the flow channel outlet, and the flow channel configuration makes The coolant that has just entered directly enters the center, and then bypasses to form a flow channel outlet from one edge. At the same time, the coolant in different sections can be heat exchanged during the bypass process, so the optimal cooling temperature can be achieved. Effect.

The purpose, technical content, characteristics and achieved effects of the present invention will be more easily understood through detailed description of specific embodiments below.

1: Large area uniform temperature liquid cooling plate

10: Liquid cooling plate body

101: first side

102:Second side

103:Third side

104:Fourth side

20:Flow channel

201:First section

202:Second Section

203:The third section

204:The fourth section

205:The fifth section

206:Sixth Section

207:Seventh Section

21:The first flow channel

22:Second flow channel

23:The third flow channel

24:The fourth flow channel

31:Flow channel entrance

32: Runner outlet

71:Battery core

72:Cushion pad

80:Battery module

M1: center line

M2: center line

Figure 1 is a schematic diagram of the new large-area uniform temperature liquid cooling plate.

Figure 2A is a schematic diagram of the flow channel configuration of the new large-area uniform temperature liquid cooling plate.

Figure 2B is a schematic diagram of the flow channel section of the new large-area uniform temperature liquid cooling plate.

Figure 3 is a schematic diagram of the new large-area uniform temperature liquid cooling plate applied to the battery core.

Figure 4 is a schematic diagram of the new large-area uniform temperature liquid cooling plate used in a battery module.

In order to make the advantages, spirit and characteristics of the present invention more easily and clearly understood, embodiments will be described and discussed in detail with reference to the drawings. It should be noted that these embodiments are only representative embodiments of the present invention, and do not limit the scope of implementation and claims of the present invention to only these embodiments. The purpose of providing these embodiments is only to make the disclosure of the present invention more thorough and easy to understand.

The terms used in the various embodiments disclosed in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the various embodiments disclosed in the present invention. Unless otherwise expressly indicated, references to the singular include the plural as well. Unless otherwise limited, in this All terms (including technical terms and scientific terms) used in the specification have the same meanings as commonly understood by a person of ordinary skill in the art to which the various embodiments disclosed in the present invention belong. The above terms (such as terms defined in general usage dictionaries) will be interpreted to have the same meaning as the contextual meaning in the same technical field, and will not be interpreted as having an idealized meaning or an overly formal meaning, unless are clearly defined in the various embodiments of the present disclosure.

In the description of this specification, reference to the terms "an embodiment", "an specific embodiment", etc. means that a specific feature, structure, material or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. . In this specification, schematic expressions of the above terms do not necessarily refer to the same embodiment. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In the description of the present invention, unless otherwise specified or limited, it should be noted that the terms "coupling", "connection" and "setting" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be a mechanical connection or an electrical connection. It is the internal connection between two components, which can be directly connected or connected through an intermediate medium. For those with ordinary knowledge in the field, the specific meaning of the above terms can be understood according to the specific situation.

The large-area uniform temperature liquid cooling plate disclosed in the present invention, please refer to Figure 1. The large-area uniform temperature liquid cooling plate 1 includes a liquid cooling plate body 10 and at least one flow channel 20 provided in the liquid cooling plate body 10. The channel 20 has a flow channel inlet 31 and a flow channel outlet 32 for the cooling liquid to flow in and out. The liquid cooling plate body 10 is in the shape of a thin plate, and its shape and size can be designed according to the components to be cooled. For example, such as application For the battery core, it is designed to be rectangular or square according to the shape of the battery core. If it is used in other components, it can be designed into different shapes. In the following figures, only the liquid cooling plate body 10 is a square shape for explanation, but the present invention is not particularly limited and can only be applied to this. Furthermore, the liquid cooling plate The body 10 is made of a material with high thermal conductivity. At the same time, it needs to meet the requirement of being lightweight when used in battery cells, so the material is preferably (but not limited to) aluminum.

The liquid cooling plate body 10 has an opposite first side 101 and a second side 102, and a third side 103 and a fourth side adjacent to the first side 101 and the second side 102 and located on opposite sides. The side 104 , the flow channel inlet 31 and the flow channel outlet 32 are all disposed on the first side 101 . Furthermore, the flow channel 20 may include a plurality of secondary flow channels. As shown in the figure, it includes a first flow channel 21, a second flow channel 22, a third flow channel 23 and a fourth flow channel. 24, and the first flow channel 21, the second flow channel 22, the third flow channel 23 and the fourth flow channel 24 are closed to each other and do not flow with each other. In other words, each flow channel enters through the flow channel inlet 31. After the secondary flow channels (including the first flow channel 21, the second flow channel 22, the third flow channel 23 and the fourth flow channel 24), the coolant in the cooling process only flows through its own secondary flow channel (the first flow channel). The secondary flow channel 21, the second flow channel 22, the third flow channel 23 and the fourth flow channel 24) flow in each other and do not circulate with each other. The coolant will not flow out until the flow channel outlet 32; therefore, , the cross-sectional area of the flow channel inlet 31 and the flow channel outlet 32 will be larger than the cross-sectional area of the flow channel 20 (the first flow channel 21, the second flow channel 22, the third flow channel 23 and the fourth flow channel 24) , to allow a sufficient amount of cooling liquid to flow in (flow channel inlet 31) and to provide enough space to collect the cooling liquid (flow channel outlet 32). The secondary flow channels (the first flow channel 21, the second flow channel 22, the third flow channel 23 and the fourth flow channel 24) in the flow channel 20 are all closed and do not circulate with each other, so water can be effectively avoided. The problem of insufficient pressure.

Please continue to refer to Figure 2A to illustrate the configuration of the flow channel 20 of the present invention. At the same time, in order to make the various sections of the flow channel 20 configured more clearly, please also refer to Figure 2B. In Figure 2B, only the The liquid cooling plate body 10 and the flow channel 20 on it are omitted to highlight its relative position. Generally speaking, the heat dissipation effect of the central part of the liquid cooling plate body 10 will be poor due to the structural position. From a geometric structure point of view, the center line of the first side 101 and the second side 102 of the liquid cooling plate body 10 The intersection of M1 and the center line M2 of the third side 103 and the fourth side 104 can be regarded as the center, and the flow channel inlet 31 is designed to be entered from the first side 101. Therefore, the flow channel inlet 31 is arranged adjacent to The center line M1 (that is, the flow channel inlet 31 will be closer to the center line M1 or the center than the flow channel outlet 32), and then the flow channel 20 is extended toward the center and through the center line M2 to form the first section 201. It is then bent across the center line M1 to form the second section 202, and then bent and extended towards the first side 101 to form the third section 203, so that the second section 202 covers the center of the liquid cooling plate body 10 (i.e. is the geometric center position on the plane of the liquid cooling plate body 10, that is, the intersection of the center line M1 and the center line M2), the first section 201 and the third section 203 are approximately located at the center line M1 of the first side 101 both sides. Since the second section 202 covers the center of the liquid cooling plate body 10, the time for the cooling liquid with a lower temperature to pass through the center of the liquid cooling plate body 10 can be extended to achieve the best heat dissipation effect.

Then bend the edge toward the first side 101, that is, toward the third side 103, to form the fourth section 204, and then continue to move away from the first side 101 (that is, toward the second side 102). ), passing through the center line M2 to form the fifth section 205, and then bending it along the direction parallel to the second side 102 to pass through the center line M1 to form the sixth section 206, and finally bending it toward the first side 101 , passing through the center line M2 to form a seventh section 207, and then the seventh section 207 will continue to enter the flow channel outlet 32. It should be noted here that the configuration of the flow channel 20 is roughly parallel to the first side 101, the second side 102, the third side 103 and the fourth side 104 as shown in the figure. However, according to actual usage needs, It can also be designed to be non-parallel (that is, an oblique configuration); furthermore, the secondary flow channels of the flow channel 20 (the first flow channel 21, the second flow channel 22, the third flow channel 23 and the fourth flow channel) The quantity of channel 24) can also be adjusted (increased or decreased) according to actual needs. In addition, referring also to Figure 2A, the fourth section 204 covers the center of the lower right area of the liquid cooling plate body 10 (that is, the geometric center position on the plane of the lower right area of the liquid cooling plate body 10), which can further enhance heat dissipation. Effect.

The configuration of the aforementioned sections is named according to the order of the coolant flow channels, that is, after the coolant enters from the flow channel inlet 31, it will first enter the first section 201, and then enter the second section 202, and the third section in sequence. section 203, the fourth section 204, the fifth section 205, the sixth section 206 and the seventh section 207, and then flow out from the flow channel outlet 32, so the coolant temperature in the first section 201 is the lowest, according to The sequence temperatures from low to high are the second section 202, the third section 203, the fourth section 204, the fifth section 205, the sixth section 206 and the seventh section 207. Therefore, the design of the first section The section 201 extends directly towards the center of the liquid cooling plate body 10, roughly making the first section 201, the second section 202 and the third section 203 meander in the central part, that is, the coolant with the lowest temperature can directly Target the areas with the highest temperatures to cool them down. On the other hand, since the second section 202 includes the center of the liquid cooling plate body 10, the time for the cooling liquid with a lower temperature to pass through the center of the liquid cooling plate body 10 can be extended to achieve the best heat dissipation effect. Since the fourth section 204 covers the center of the lower right area of the liquid cooling plate body 10 (that is, the geometric center position on the plane of the lower right area of the liquid cooling plate body 10), the heat dissipation effect can be further enhanced.

Furthermore, through the configuration of the aforementioned sections, the first section 201 with the lowest temperature will be adjacent to the seventh section 207 with the highest temperature, so that it can perform heat exchange to balance the temperature difference; similarly, the second-lowest temperature section 201 will be adjacent to the seventh section 207 with the highest temperature. The second section 202 will be adjacent to the sixth section 206 with the second highest temperature for heat exchange to balance the temperature difference, and the third section 203 with the third lowest temperature will be adjacent to the fifth section 205 with the third highest temperature for heat exchange. Exchange to balance the temperature difference, thus optimizing the temperature equalization effect of the liquid cooling plate body 10 . In addition, looking at the center line M2 of the third side 103 and the fourth side 104, it will pass through four sections (the first section 201, the third section 203, the fifth section 205 and the seventh section 207), the direction of water flow in each section is parallel; in this design, the main consideration is that if the number of sections is too small, it will be difficult for the flow channel 20 to be evenly arranged on the liquid cooling plate body 10. If the number of sections is increased, the flow channel 20 will need to be bypassed. The distance will be too long, The temperature equalization effect achieved is limited. Therefore, this new model configures four sections (the first section 201, the third section 203, the fifth section 205 and the seventh section 207) to achieve the best The heat dissipation effect and temperature uniformity.

As can be seen from the above, the large-area uniform temperature liquid-cooling plate in this case mainly includes a liquid-cooling plate body 10; and a flow channel 20 provided on the liquid-cooling plate body. The flow channel 20 can be positioned according to the position on the liquid-cooling plate body 10. The functional area is divided into an outward drainage area and an inward drainage area. The outward drainage area is close to the surrounding sides of the liquid cooling plate body 10 and is used to guide the fluid (not shown in the figure) in the flow channel 20 away from the liquid cooling plate body 10; the inward drainage area is compared with the outward drainage area. Closer to the center of the liquid cooling plate body 10. The end of the outward drainage area is the flow channel outlet 32, the end of the inward drainage area is connected with the front end of the outward drainage area, and the front end of the inward drainage area is the flow channel inlet 31. The inward drainage area has a plurality of turning drainage areas to turn the inward drainage area from the front end to connect with the outward drainage area. The outward diversion area also has several turning diversion areas to turn the outward diversion area from the front end to the end of the outward diversion area, so that the fluid contained in the flow channel can be led out. The above-mentioned turning guide area is defined as the intermediate transition area when the fluid is changed from the original first direction to the opposite second direction. The turning guide area allows the fluid to flow in a third direction different from the first direction and the second direction, so as to buffer and reduce the pressure loss of the fluid and increase the contact area between the flow channel and the liquid cooling plate. For example, the third direction is perpendicular to the first direction and the second direction. In this case, the first turning guide area of the inward flow area is to at least cover the center of the liquid cooling plate body to increase the contact area between the center of the liquid cooling plate body 10 and the flow channel, so as to achieve the goal of targeting the liquid cooling plate body 10 High-temperature areas that are difficult to dissipate are cooled by fluids that are still at lower temperatures.

According to the embodiment of this case, the first section 201, the second section 202 and the third section 203 are the inward drainage areas. The front end of the inward drainage area is the flow channel inlet 31. The fourth section 204 and the third section 203 are the inward drainage areas. The fifth section 205 , the sixth section 206 and the seventh section 207 are the outward drainage areas, the ends of which are the flow channel outlets 32 , and the ends of the inward drainage areas are connected with the front ends of the outward drainage areas. The second section 202 can be regarded as the first turning guide area where the first section 201 turns to the opposite flow direction. The fourth section and the sixth section also serve as the turning guide area, which in turn can be called the second The turning guide area and the third turning guide area are further away from the center of the liquid cooling plate body 10 than the first turning guide area. The outward drainage area is adjacent to the inward drainage area, and the outward drainage area surrounds the inward drainage area, so that the outer drainage area can exchange heat with the inward drainage area to balance the temperature difference. The inward drainage area is used to guide the cooling liquid directly toward the center of the liquid cooling plate body 10. Therefore, the inward drainage area is closer to the center of the liquid cooling plate body 10 than the outward drainage area. At the same time, the inward drainage area has a third A turning guide area (second section 202), the first turning guide area is bent at the center of the liquid cooling plate body 10, so the first turning guide area at least covers part of the liquid cooling plate body 10 center part. At the same time, the flow channel 20 has a second turning guide area (fourth section 204) between the inward flow guide area and the outward flow guide area, and is bent by this second turn guide area to bypass the liquid cooling plate. The body 10 is configured and cooled. Therefore, the first turning guide area (second section 202), the second turning guide area (fourth section 204) and the third turning guide area (sixth section 206 ) all have flow channels 20 that are roughly parallel to the center line M2.

When applied to battery cells, please refer to Figure 3. The large-area uniform temperature liquid cooling plate 1 of the present invention can be clamped between two battery cells 71 to form a group, and can be reused between groups. Cushion pads 72 (for example, made of foam material) are used to separate them, so that they are stacked in sequence to complete the core of the power battery pack. At the same time, through the temperature equalization effect provided by the large-area temperature equalizing liquid cooling plate 1 of the present invention, the power battery Thermal management efficiency is improved, and the electrical performance and service life of the battery core 71 are improved. On the other hand, when applied to battery modules, please refer to Figure 4. As shown in the figure, a new large-area uniform temperature liquid cooling plate 1 is installed below the group of square battery modules 80. This can conduct heat conduction and Dissipate heat to achieve a uniform temperature cooling effect and avoid excessive temperature of the battery module 80 arranged in the middle.

In summary, this new model proposes a large-area uniform temperature liquid cooling plate, which is suitable for larger-sized batteries. The inlet of the flow channel is closer to the center than the outlet of the flow channel, and the lowest-temperature coolant first passes through the center, It also provides a plurality of flow channel sections for heat exchange, and cooperates with the design of four horizontal flow channel sections to achieve optimal temperature uniformity. In this way, the thermal efficiency of the applied power battery can be greatly improved. Management effectiveness.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes or modifications based on the characteristics and spirit described in the scope of the present invention shall be included in the scope of the patent of the present invention.

1: Large area uniform temperature liquid cooling plate

10: Liquid cooling plate body

101: first side

102:Second side

103:Third side

104:Fourth side

20:Flow channel

201:First section

202:Second Section

203:The third section

204:The fourth section

205:The fifth section

206:Sixth Section

207:Seventh Section

21:The first flow channel

22:Second flow channel

23:The third flow channel

24:The fourth flow channel

31:Flow channel entrance

32: Runner outlet

M1: center line

M2: center line

Claims (10)

A large-area uniform temperature liquid-cooling plate includes a liquid-cooling plate body and at least one flow channel provided on the liquid-cooling plate body. The flow channel has a first-channel inlet and a first-channel outlet, and is characterized by: The flow channel inlet is located on one side of the liquid cooling plate body and adjacent to a center line of the side. The flow channel extends toward the center of the liquid cooling plate body to form a first section, which is continuously bent and passed through. A second section is formed through the center line, a third section is formed by continuous bending towards the side, a fourth section is formed by continuous bending along the edge of the side, and a fourth section is formed by continuous bending away from the side. The fifth section is continuously bent through the center line to form a sixth section, and is continuously bent towards the side to form a seventh section. The seventh section then enters the outlet of the flow channel and exits from the side. The other edge of the side flows out, wherein the second section covers the central part of the liquid cooling plate body. The large-area uniform temperature liquid cooling plate of claim 1, wherein the first section is adjacent to the seventh section and can perform heat exchange. The large-area uniform temperature liquid cooling plate of claim 1, wherein the third section is adjacent to the fifth section and can perform heat exchange. The large-area uniform temperature liquid cooling plate of claim 1, wherein the second section is adjacent to the sixth section and can perform heat exchange. The large-area uniform temperature liquid cooling plate as described in claim 1, wherein the flow channel has a plurality of secondary flow channels, and each of the secondary flow channels is closed and does not circulate with each other. The large-area uniform temperature liquid cooling plate as described in claim 1, wherein the flow A track will have four segments parallel to the center line. A large-area uniform temperature liquid-cooling plate, which includes: a liquid-cooling plate body; and at least one channel, which is provided on the liquid-cooling plate body. The flow channel includes: an outward drainage area, the end of which is the flow channel. the outlet of the channel; and an inward drainage area, the end of which is connected with the front end of the outward drainage area, the front end of the inward drainage area is the entrance of the flow channel, and the inward drainage area is closer to the liquid than the outward drainage area. In the central part of the cold plate body, the inward flow guiding area has a first turning flow guiding area, and the first turning flow guiding area at least covers the central part of the liquid cooling plate body. The large-area uniform temperature liquid cooling plate according to claim 7, wherein the flow channel further has a second turning guide area, which is farther away from the center of the liquid cooling plate body than the first turning guide area. . The large-area uniform temperature liquid cooling plate of claim 8, wherein the first turning guide area and the second turning guide area include flow channels that are parallel to each other. The large-area uniform temperature liquid cooling plate of claim 7, wherein the outward drainage area is adjacent to the inward drainage area, and the outward drainage area surrounds the inward drainage area.

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