A cold plate PTC heater
By using a cold plate structure and modular design, the PTC heater solves the problems of complex structure and large space occupation of existing PTC heaters, achieving lightweight, thinness and high-efficiency heat exchange, which is suitable for the thermal management system of new energy vehicles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG YINLUN MACHINERY
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-31
AI Technical Summary
Existing PTC heaters have complex structures and occupy a large space, making it difficult to meet the requirements of compact layout and high integration of thermal management systems for new energy vehicles.
The design employs a cold plate structure, in which a PTC heating plate is sandwiched between two liquid cooling plates. The PTC heating plate includes a limiting frame and a heating core, with the projection of the heating core located within the flow channel cavity of the liquid cooling plate. Combined with a modular stacking design and fin structure, this achieves efficient heat exchange and a compact design.
It achieves overall lightweighting and thinning of PTC heaters, while improving thermal conductivity and heat exchange efficiency, and has a simple structure that is easy to integrate and expand.
Smart Images
Figure CN224583336U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of PTC heater technology, and in particular to a cold plate type PTC heater. Background Technology
[0002] With the continuous iteration and upgrading of new energy vehicle technology, OEMs have put forward more stringent requirements for component design, especially in terms of minimizing size and optimizing weight. PTC (Positive Temperature Coefficient) heaters, with their advantages such as automatic temperature control and rapid heating, are widely used in the field of new energy vehicles.
[0003] However, despite the excellent heating performance and safety of PTC heaters, their overall structure still has certain shortcomings. Current PTC heaters generally suffer from complex structures and large space occupation, making it difficult to meet the needs of compact layout and high integration in the thermal management system of new energy vehicles.
[0004] Therefore, it is necessary to propose a new technical solution to overcome the shortcomings of existing technologies. Utility Model Content
[0005] Based on this, this application provides a cold plate type PTC heater, which achieves a compact structural design while meeting the requirements of efficient heat exchange through structural optimization.
[0006] Therefore, this application adopts the following technical solution: a cold plate type PTC heater, comprising at least two stacked liquid cooling plates and at least one PTC heating plate, each of the liquid cooling plates being configured with sealed edges and having an internal flow channel cavity for heat exchange medium circulation, the PTC heating plate being disposed between two adjacent liquid cooling plates for heat exchange with the two liquid cooling plates, wherein the PTC heating plate includes a limiting frame and a heating core disposed within the limiting frame, the projection of the heating core along the direction perpendicular to the surface of the PTC heating plate being located within the coverage area of the flow channel cavity of the two liquid cooling plates.
[0007] In some embodiments, each of the liquid cooling plates includes an upper cover plate, a lower cover plate, a support column, and a flow-disrupting structure. The edges of the upper cover plate and the lower cover plate are sealed together to enclose the flow channel cavity therein. The support column is located in the flow channel cavity and supported between the upper cover plate and the lower cover plate. The flow-disrupting structure is disposed in the flow channel cavity.
[0008] Alternatively, each of the liquid cooling plates includes an upper cover plate, a middle frame, a lower cover plate, a support column, and a flow-disrupting structure, wherein the middle frame is clamped between the edges of the upper cover plate and the lower cover plate or is confined within a groove formed on the inner side of the edges of the upper cover plate and / or the lower cover plate, and the upper cover plate, the middle frame, and the lower cover plate are sealed together to enclose the flow channel cavity.
[0009] In some embodiments, the cold plate PTC heater includes a plurality of connectors that lock and fix the liquid cooling plate and the PTC heating plate; wherein at least a portion of the connectors pass through the upper cover plate, the lower cover plate, and the limiting frame of the PTC heating plate; and / or, at least a portion of the connectors pass through the upper cover plate, the support column, the lower cover plate, and the limiting frame of the PTC heating plate.
[0010] In some embodiments, the limiting frame includes a frame corresponding to the edge of the liquid cooling plate and at least one reinforcing strip connecting opposite sides of the frame, wherein the support post is positioned opposite the reinforcing strip.
[0011] In some embodiments, the limiting frame is sealed to the two liquid cooling plates respectively.
[0012] In some embodiments, a polyimide insulating film is provided between the PTC heating plate and the two liquid cooling plates.
[0013] In some embodiments, the pins of the heating core are located within the limiting frame, the pins are electrically connected to wires, and the limiting frame has outlet holes for the wires to be led out.
[0014] In some embodiments, the cold plate type PTC heater includes an inlet pipe and an outlet pipe connecting the flow channel cavities of the two liquid cooling plates, and a flange assembly connected to the inlet pipe or the outlet pipe is provided between the two liquid cooling plates.
[0015] In some embodiments, the flange assembly includes an upper flange connected to one of two liquid cooling plates and a lower flange connected to the other of the two liquid cooling plates. One of the upper flange and the lower flange is provided with a sealing groove, and the other is provided with a sealing protrusion. A sealing ring is installed in the sealing groove, and the sealing protrusion is pressed onto the sealing ring.
[0016] In some embodiments, the cold plate type PTC heater includes N liquid cooling plates and N-1 PTC heating plates, wherein the liquid cooling plates and the PTC heating plates are stacked alternately, and N is a positive integer not less than 2.
[0017] The cold plate PTC heater provided in this application adopts an arrangement of two liquid cooling plates sandwiching a PTC heating plate. The PTC heating plate includes a limiting frame and a heating core disposed within the limiting frame. The projection of the heating core along the direction perpendicular to the PTC heating plate is located within the coverage area of the flow channel cavity of the two liquid cooling plates, which makes the overall weight of the PTC heater lighter, the thickness thinner, and the thermal conductivity better. While meeting the requirements of efficient heat exchange, it achieves a compact structural design. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a perspective view of an embodiment of the cold plate type PTC heater of this application.
[0020] Figure 2 This is an exploded perspective view of an embodiment of the cold plate type PTC heater of this application.
[0021] Figure 3 This is a cross-sectional view of an embodiment of the cold plate type PTC heater of this application.
[0022] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.
[0023] Figure 5 for Figure 3 A magnified view of a section at point B.
[0024] Figure 6 This is another cross-sectional view of an embodiment of the cold plate type PTC heater of this application.
[0025] The component labels are as follows:
[0026] 100. Cold plate PTC heater; 1. Liquid cooling plate; 11. Top cover plate; 12. Middle frame; 13. Bottom cover plate; 14. Fins; 15. Support column; 101. Liquid inlet pipe; 102. Liquid outlet pipe; 2. PTC heating plate; 21. Limiting frame; 210. Cable outlet hole; 211. Frame; 212. Reinforcing strip; 22. Heating core; 221. Wire; 3. Polyimide insulating film; 4. Flange assembly; 41. Upper flange; 42. Lower flange; 43. Sealing ring; 5. Connecting parts. Detailed Implementation
[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.
[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0031] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.
[0032] Please see Figures 1 to 6 As shown, this application provides a cold-plate type PTC heater 100, which includes at least two stacked liquid-cooled plates 1 and at least one PTC heating plate 2. Each liquid-cooled plate 1 is configured with a sealed edge and an internal flow channel cavity for the flow of heat exchange medium. The PTC heating plate 2 is disposed between two adjacent liquid-cooled plates 1 for heat exchange with the two liquid-cooled plates 1. The PTC heating plate 2 includes a limiting frame 21 and a heating core 22 disposed within the limiting frame 21. The projection of the heating core 22 along a direction perpendicular to the surface of the PTC heating plate 2 is located within the coverage area of the flow channel cavity of the two liquid-cooled plates 1.
[0033] The cold-plate PTC heater 100 provided in this application adopts an arrangement of two liquid-cooled plates 1 sandwiching a PTC heating plate 2. The heating core 22 included in the PTC heating plate 2 is projected along a direction perpendicular to the PTC heating plate 2 within the coverage area of the flow channel cavity of the two liquid-cooled plates 1. This arrangement makes the overall weight of the cold-plate PTC heater 100 lighter, thinner, and has better thermal conductivity, achieving a compact structural design while meeting the requirements of efficient heat exchange. Moreover, since the overall structure of the cold-plate PTC heater 100 provided in this application adopts a modular stacking design, a multi-layer heat exchange structure is formed by alternating arrangement of liquid-cooled plates 1 and PTC heating plates 2. It is easy to assemble and the number of liquid-cooled plates 1 and PTC heating plates 2 can be expanded according to actual application requirements.
[0034] Please see Figures 1 to 3 As shown, the cold-plate PTC heater 100 includes at least two liquid-cooled plates 1 and one PTC heating plate 2. The two liquid-cooled plates 1 and one PTC heating plate 2 constitute the most basic stacking method. In some embodiments, the PTC heating plate 2 and the liquid-cooled plate 1 can be further stacked sequentially. In the embodiment shown in the accompanying drawings, the cold-plate PTC heater 100 includes three liquid-cooled plates 1 and two PTC heating plates 2. Each PTC heating plate 2 is sandwiched between two liquid-cooled plates 1. The PTC heating plate 2 and the liquid-cooled plate 1 are connected by a connector 5 to form a tight contact to achieve efficient heat transfer. The liquid-cooled plate 1 serves as a carrier for the heat exchange medium, and its interior has a flow channel cavity for the coolant to flow. The PTC heating plate 2 serves as a heat source generating device, and the heating core 22 is fixed by a limiting frame 21 to ensure that the heating area formed by the heating core 22 matches and is aligned with the coverage area of the flow channel cavity of the liquid-cooled plate 1. This layout ensures that the heat generated by the heating core 22 can be fully absorbed by the liquid cooling plate 1, avoiding energy waste. It allows the heating energy to be directly transferred to the liquid cooling plates 1 on both sides through the PTC heating plate 2, and then output to the outside through the heat exchange medium flowing in the liquid cooling plate 1, forming an efficient heat exchange path.
[0035] Please see Figures 2 to 5 As shown, in this embodiment, each liquid cooling plate 1 includes an upper cover plate 11, a middle frame 12, a lower cover plate 13, a flow-disrupting structure, and a support column 15. The middle frame 12 is sandwiched between the upper cover plate 11 and the lower cover plate 13 to enclose the flow channel cavity. The flow-disrupting structure is disposed in the flow channel cavity. The support column 15 is located in the flow channel cavity and is supported between the upper cover plate 11 and the lower cover plate 13.
[0036] Specifically, in this embodiment, each liquid cooling plate 1 adopts a three-layer composite structure, including an upper cover plate 11, a middle frame 12, and a lower cover plate 13. The middle frame 12 is sandwiched between the upper cover plate 11 and the lower cover plate 13. The three components are sealed at the edges through welding, jointly enclosing the flow channel cavity. In this embodiment, the upper cover plate 11 and the lower cover plate 13 are both flat, and the middle frame 12 is a hollow frame. The three components together enclose the flow channel cavity, wherein the upper cover plate 11 forms the upper wall of the flow channel cavity, the lower cover plate 13 forms the bottom wall of the flow channel cavity, and the middle frame 12 forms the side wall of the flow channel cavity. In this embodiment, the upper cover plate 11, the middle frame 12, the lower cover plate 13, and the support column 15 are fixed by welding with brazing, without brazing, or vacuum brazing. In other embodiments, the above components can also be sealed and connected by other methods such as adhesive bonding or pressing sealing rings.
[0037] In some other embodiments, at least one of the upper cover plate 11 and the lower cover plate 13 may be provided with a flanged structure to form a groove on the inner side of its edge, and the intermediate frame 12 may be confined within the groove. This arrangement facilitates the positioning of the intermediate frame 12 and improves assembly efficiency, and also increases the welding area between the intermediate frame 12 and the upper and lower cover plates, enhancing the reliability of the welding. In other embodiments, the intermediate frame 12 may be omitted, and at least one of the upper cover plate 11 and the lower cover plate 13 may have a sidewall formed on its edge, with the edges of the upper cover plate 11 and the lower cover plate 13 directly sealingly connecting and enclosing the flow channel cavity.
[0038] In this embodiment, the turbulence-inducing structure inside the flow channel cavity is a fin 14. The fin 14 is used to enhance the turbulence of the heat exchange medium inside the flow channel cavity and improve the heat exchange efficiency. By setting the fin 14 inside the flow channel cavity, the heat exchange efficiency of the liquid cooling plate 1 can be significantly improved. At the same time, by using fins 14 with different structural parameters, different heat exchange capacities and water flow resistances can be achieved, thereby meeting the usage requirements of different scenarios. In other embodiments, the turbulence-inducing structure can also be a turbulence-inducing protrusion set on the upper cover plate 11 or the lower cover plate 13.
[0039] In this embodiment, the support column 15 extends perpendicular to the upper and lower cover plates, with its two ends abutting against the upper cover plate 11 and the lower cover plate 13 respectively, thus maintaining the stability of the flow channel cavity structure and preventing the upper cover plate 11 or the lower cover plate 13 from being deformed under pressure. In this embodiment, the support column 15 is a cylindrical hollow structure, and it is a three-section stepped shaft with a larger diameter in the middle and smaller diameters at both ends. The smaller diameter portions at both ends can be inserted into the positioning holes on the upper cover plate 11 and the lower cover plate 13 for positioning, while the larger diameter portion in the middle is clamped between the upper cover plate 11 and the lower cover plate 13. In this embodiment, there are multiple support columns 15, which are approximately located at the centerline of the flow channel cavity to provide better support. The hollow structure of the support column 15 allows screws or other connecting parts 5 to pass through to lock and fix the liquid cooling plate 1 and the PTC heating plate 2. In this embodiment, the support column 15 is welded and fixed to the upper cover plate 11 and the lower cover plate 13; in other embodiments, the support column 15 may be configured as an integrally formed structure with the upper cover plate 11 or the lower cover plate 13; in other embodiments, the support column 15 may be configured as a separate component from the upper cover plate 11 and the lower cover plate 13. Please refer to [link / reference]. Figures 1 to 3 As shown, in this embodiment, the PTC heating plate 2 includes a limiting frame 21 and multiple heating cores 22. The pins of the heating cores 22 are located inside the limiting frame 21, and the limiting frame 21 has an outlet hole 210 for the wires 221 that are electrically connected to the pins; that is, the heating cores 22 are embedded inside the limiting frame 21, and their pins are located within the frame 211 area of the limiting frame 21, and are connected to an external power source through the wires 221. To facilitate the exit of the wires 221, an outlet hole 210 is provided at the frame 211 of the limiting frame 21, and the outlet hole 210 is filled with sealant to prevent moisture from seeping in. This embodiment reduces external electrical risks and improves overall safety by placing the pins inside the limiting frame 21, and the exit wires 221 can be crimped with different terminals to meet different docking requirements.
[0040] The limiting frame 21 is made of a high-temperature resistant insulating material, such as modified PPS, modified PBT, or alumina ceramic. In this embodiment, the limiting frame 21 includes a frame 211 corresponding to the edge of the liquid cooling plate 1 and at least one reinforcing strip 212 connecting the opposite sides of the frame 211. Specifically, in this embodiment, both the PTC heating plate 2 and the liquid cooling plate 1 are approximately rectangular plates. The limiting frame 21 is a rectangular frame, with three sides roughly flush with the three sides of the liquid cooling plate 1, and another side positioned further inward relative to that side of the liquid cooling plate 1 to avoid the inlet and outlet ports on the liquid cooling plate 1. At least one reinforcing strip 212 extends from the inner side of the frame 211. The reinforcing strip 212 serves to enhance the mechanical strength of the limiting frame 21 and can be used for locking and fixing with screws or other connecting parts 5. In this embodiment, the support column 15 is positioned directly opposite the reinforcing strip 212.
[0041] Please see Figure 4 and Figure 5 As shown, the cold-plate PTC heater 100 includes several connecting members 5 that lock and fix the liquid-cooled plate 1 and the PTC heating plate 2. At least a portion of the connecting members 5 pass through the upper cover plate 11, the middle frame 12, the lower cover plate 13, and the limiting frame 21 of the PTC heating plate 2; or, at least a portion of the connecting members pass through the upper cover plate 11, the support column 15, the lower cover plate 13, and the limiting frame 21 of the PTC heating plate 2. Figure 4 As shown, the connector 5, which connects the liquid cooling plate 1 and the PTC heating plate 2 at the edge, passes sequentially through the upper cover plate 11, the middle frame 12, the lower cover plate 13 of the liquid cooling plate 1, and the limiting frame 21 of the PTC heating plate 2, and is finally locked onto the connecting cap with a nut on the outermost liquid cooling plate 1, achieving a tight connection of the components through axial tension. Figure 5 As shown, the connector 5, which connects the liquid cooling plate 1 and the PTC heating plate 2 at the middle, passes sequentially through the upper cover plate 11, support column 15, lower cover plate 13 of the liquid cooling plate 1, and the limiting frame 21 of the PTC heating plate 2, and is finally locked onto the connecting cap with a nut on the outermost liquid cooling plate 1. A tight connection of the components is achieved through axial tension. Using connectors 5 at both the edge and the middle ensures the reliability of the connection and prevents deformation in the middle region that could weaken heat transfer performance. In this embodiment, the connector 5 is a bolt. In other embodiments, rivets, clips, or other connection structures can also be used.
[0042] Furthermore, the limiting frame 21 is sealed to the two liquid cooling plates 1 located on its sides. Specifically, in this embodiment, the upper and lower surfaces of the limiting frame 21 are coated with adhesive to seal the liquid cooling plates 1 located on its upper and lower sides in the stacking direction, thereby forming a sealed space between the PTC heating plate 2 and the liquid cooling plates 1. This provides waterproofing and dustproofing for the heating core 22 inside the limiting frame 21, preventing water vapor, dust, and other impurities from entering the heating core 22 and causing short circuits, explosions, or other failures. In other embodiments, the two sides of the limiting frame 21 can also be sealed to the upper and lower liquid cooling plates 1 by setting sealing rings. The sealing rings are clamped and deformed by the fastening connection of the connecting piece 5 to achieve a sealing effect.
[0043] Furthermore, such as Figure 2 As shown, a polyimide insulating film 3 is respectively disposed between the PTC heating plate 2 and the two adjacent liquid cooling plates 1. In this embodiment, the polyimide insulating film 3 covers both sides of the heating core 22. The use of a polyimide film in this embodiment effectively blocks current conduction between the heating core 22 and the metal components of the liquid cooling plate 1, while its low thermal resistance does not significantly hinder heat transfer. Compared to traditional alumina ceramic insulating boards for insulation, the polyimide insulating film 3 is lighter, thinner, and has better thermal conductivity. Of course, in other embodiments, alumina ceramic insulating boards or other insulating materials can also be used for insulation.
[0044] Please see Figure 2 and Figure 6 As shown, in this embodiment, the cold-plate type PTC heater 100 includes an inlet pipe 101 and an outlet pipe 102 connecting the flow channel cavities of the multiple liquid-cooled plates 1, and a flange assembly 4 connected to the inlet pipe 101 or the outlet pipe 102 is provided between two adjacent liquid-cooled plates 1. Specifically, the flange assembly 4 includes an upper flange 41 connected to one of the two liquid-cooled plates 1, and a lower flange 42 connected to the other of the two liquid-cooled plates 1. One of the upper flange 41 and the lower flange 42 is provided with a sealing groove, and the other is provided with a sealing protrusion. A sealing ring 43 is installed in the sealing groove, and the sealing protrusion is pressed onto the sealing ring 43.
[0045] Specifically, the heat exchange medium circulation path of the cold plate PTC heater 100 is jointly formed by the inlet pipe 101, the outlet pipe 102, and the flow channel cavity inside the liquid cooling plate 1. The inlet pipe 101 and the outlet pipe 102 are respectively connected to the inlet and outlet of the flow channel cavity of the liquid cooling plate 1. In order to enable the inlet pipe 101 and the outlet pipe 102 to communicate with different flow channel cavities inside the liquid cooling plate 1 at the same time, a flange assembly 4 for fluid flow is provided in this embodiment. The flange assembly 4 includes an upper flange 41 and a lower flange 42. The upper flange 41 is connected to the lower cover plate 13 of the upper liquid cooling plate 1, and the lower flange 42 is connected to the upper cover plate 11 of the lower liquid cooling plate 1. An annular sealing groove is formed on the upper surface of the lower flange 42, and an annular sealing protrusion corresponding to the sealing groove is formed on the lower surface of the upper flange 41. A high-temperature resistant fluororubber sealing ring 43 is installed in the sealing groove. When the upper flange 41 and the lower flange 42 are tightened with bolts, the sealing protrusion presses onto the sealing ring 43, forming a reliable sealing structure.
[0046] The above embodiments are illustrated using the cold-plate PTC heater 100, which includes three liquid-cooled plates 1 and two PTC heating plates 2, as an example. However, it is understood that the number of liquid-cooled plates 1 and PTC heating plates 2 can be expanded as needed to adapt to different power level application requirements; that is, the cold-plate PTC heater 100 can include N liquid-cooled plates 1 and N-1 PTC heating plates 2, with the liquid-cooled plates 1 and PTC heating plates 2 stacked alternately, where N is a positive integer not less than 2. This expansion scheme achieves a multiple increase in heating power while maintaining a linear increase in the overall size of the heater, making it particularly suitable for scenarios requiring high-flow-rate heating.
[0047] As can be seen from the above description of the specific embodiments, the cold plate PTC heater 100 provided in this embodiment adopts a cold plate structure, which has a small thickness, simple structure, and is easy to integrate, assemble, and expand. The heating core 22 of the PTC heating plate 2 completely covers the flow channel cavity of the liquid cooling plate 1, ensuring that heat is transferred efficiently without dead angles. The liquid cooling plate 1 is provided with fins 14, which can disrupt the laminar flow state of the heat exchange medium and force the formation of turbulence to improve the convective heat transfer coefficient. The design of the support column 15 and the reinforcing strip 212 of the limiting frame 21 is aligned to enhance the structural stability and connection reliability. In addition, the thinness and low thermal resistance of the polyimide insulating film 3 achieves the effect of thickness reduction and weight reduction while ensuring thermal conductivity.
[0048] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.
Claims
1. A cold plate PTC heater characterized by, The device includes at least two stacked liquid cooling plates (1) and at least one PTC heating plate (2). Each liquid cooling plate (1) is configured with a sealed edge and an internal flow channel cavity for heat exchange medium circulation. The PTC heating plate (2) is disposed between two adjacent liquid cooling plates (1) for heat exchange with the two liquid cooling plates (1). The PTC heating plate (2) includes a limiting frame (21) and a heating core (22) disposed within the limiting frame (21). The projection of the heating core (22) along the direction perpendicular to the surface of the PTC heating plate (2) is located within the coverage area of the flow channel cavity of the two liquid cooling plates (1).
2. The cold-plate PTC heater of claim 1, wherein Each of the liquid cooling plates (1) includes an upper cover plate (11), a lower cover plate (13), a support column (15), and a flow disturbance structure. The edges of the upper cover plate (11) and the lower cover plate (13) are sealed together to form the flow channel cavity. The support column (15) is located in the flow channel cavity and supported between the upper cover plate (11) and the lower cover plate (13). The flow disturbance structure is disposed in the flow channel cavity. Alternatively, each of the liquid cooling plates (1) includes an upper cover plate (11), a middle frame (12), a lower cover plate (13), a support column (15), and a flow-disrupting structure, wherein the middle frame (12) is clamped between the edges of the upper cover plate (11) and the lower cover plate (13) or is confined within a groove formed on the inner side of the edges of the upper cover plate (11) and / or the lower cover plate (13), and the upper cover plate (11), the middle frame (12), and the lower cover plate (13) are sealed together to enclose the flow channel cavity.
3. The cold-plate PTC heater of claim 2, wherein, The cold-plate PTC heater (100) includes several connecting parts (5) for locking and fixing the liquid cooling plate (1) and the PTC heating plate (2); wherein, At least part of the connector (5) passes through the upper cover plate (11), the lower cover plate (13), and the limiting frame (21) of the PTC heating plate (2); And / or, at least part of the connector (5) passes through the upper cover plate (11), the support column (15), the lower cover plate (13), and the limiting frame (21) of the PTC heating plate (2).
4. The cold-plate PTC heater of claim 3, wherein, The limiting frame (21) includes a frame (211) corresponding to the edge of the liquid cooling plate (1) and at least one reinforcing strip (212) connecting the two opposite sides of the frame (211), wherein the support column (15) is positioned opposite the reinforcing strip (212).
5. The cold-plate PTC heater according to any one of claims 1 to 4, characterized by, The limiting frame (21) is sealed to the two adjacent liquid cooling plates (1).
6. The cold-plate PTC heater of claim 1, wherein, A polyimide insulating film (3) is provided between the PTC heating plate (2) and the two adjacent liquid cooling plates (1).
7. The cold-plate PTC heater of claim 1, wherein, The pin of the heating core (22) is located inside the limiting frame (21), and the pin is electrically connected to a wire (221). The limiting frame (21) has an outlet hole (210) for the wire (221) to be led out.
8. The cold-plate PTC heater of claim 5, wherein, The cold plate type PTC heater (100) includes an inlet pipe (101) and an outlet pipe (102) that connect the flow channel cavity of two adjacent liquid cooling plates (1). A flange assembly (4) that connects to the inlet pipe (101) or the outlet pipe (102) is provided between the two adjacent liquid cooling plates (1).
9. The cold-plate type PTC heater according to claim 8, characterized in that, The flange assembly (4) includes an upper flange (41) connected to one of the two liquid cooling plates (1) and a lower flange (42) connected to the other of the two liquid cooling plates (1). One of the upper flange (41) and the lower flange (42) is provided with a sealing groove, and the other is provided with a sealing protrusion. A sealing ring (43) is installed in the sealing groove, and the sealing protrusion is pressed on the sealing ring (43).
10. The cold-plate type PTC heater according to claim 1, 6, or 7, characterized in that, The cold plate type PTC heater (100) includes N liquid cooling plates (1) and N-1 PTC heating plates (2), wherein the liquid cooling plates (1) and the PTC heating plates (2) are stacked alternately, and N is a positive integer not less than 2.