Electronic water pump and hydrogen fuel cell system

Abstract

The utility model discloses an electronic water pump and a hydrogen fuel cell system. An insulating coating is arranged on the inner surface of the electronic water pump. The insulating coating is arranged on the inner surface of the volute of the water pump, especially the contact position of the volute and cooling liquid, so that the interior of the volute and the surface of the volute are insulated, the cooling liquid and a motor shell are insulated, the insulating coating is applied to the hydrogen fuel cell system, the insulation problem of the electronic water pump in the hydrogen fuel cell system can be solved, and the service life of the electronic water pump is prolonged. And meanwhile, the risk of water leakage caused by inconsistent expansion coefficients of materials of parts of the electronic water pump is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and in particular to an electronic water pump and a hydrogen fuel cell system. Background Art

[0002] With the continuous development of modern industry, the number of traditional fuel vehicles has gradually increased, and the resulting environmental pollution and greenhouse effect problems have become increasingly severe. Fuel cell vehicles that use fuel as a driving force have attracted much attention due to their zero emission of pollutants. At the same time, the fuel cell system will generate a lot of heat during operation, which is difficult to dissipate through other means. As a key component in the thermal management system, the electronic water pump is of great significance to the cooling system.

[0003] Electronic water pumps are used in fuel cell thermal management systems, mainly to provide circulation for fuel cell coolant. Since the coolant is at risk of being electrified, the circulating water path must be insulated from the casing. Most existing electronic water pumps are unshielded pumps, and the casing will come into contact with the transport medium, making it difficult to achieve medium insulation. In addition, metal materials in contact with the coolant medium are at risk of ion precipitation, causing the stack to fail.

[0004] At present, some fuel cell electronic water pumps use non-metallic materials for parts in contact with the coolant, while metal materials are used for parts not in contact with the coolant. However, in this solution, due to the different expansion coefficients of the two materials, a gap will be generated when running at high temperatures, causing the water pump to leak and fail. Utility Model Content

[0005] In view of some or all of the problems in the prior art, the utility model provides an electronic water pump in a first aspect, comprising a volute, wherein the inner surface of the volute is provided with an insulating coating.

[0006] Furthermore, the insulating coating is made of polytetrafluoroethylene.

[0007] Furthermore, the thickness of the insulating coating is 0.05 to 0.2 mm.

[0008] Furthermore, the electronic water pump also includes:

[0009] Motor, including:

[0010] chassis;

[0011] a stator component fixed inside the casing; and

[0012] a rotor assembly, which is disposed in the inner hole of the stator component and can rotate in the stator component;

[0013] an impeller connected to the rotor assembly via a shaft and located in the volute; and

[0014] The controller is arranged at the first end of the motor, wherein the first end is the end of the motor where the impeller is not installed.

[0015] Furthermore, the motor further comprises a waterproof sleeve, and the waterproof sleeve is arranged between the rotor assembly and the stator component.

[0016] Furthermore, the controller is fixed to the first end of the motor by means of a threaded connection.

[0017] Furthermore, the volute is fixed to the second end of the motor by means of a threaded connection.

[0018] Furthermore, the electronic water pump also includes a flange, which is arranged between the volute and the casing of the motor.

[0019] Furthermore, the electronic water pump also includes a rear cover, which covers the controller and is fixed to the end of the first end of the motor housing by means of a threaded connection.

[0020] Based on the manufacturing method of the electronic water pump as described above, the second aspect of the utility model provides a hydrogen fuel cell system, which includes the electronic water pump as described above.

[0021] The utility model provides an electronic water pump and a hydrogen fuel cell system, in which an insulating coating is arranged on the inner surface of a volute of the electronic water pump, particularly at the position where the volute contacts the coolant, so that insulation is formed between the inside of the volute and the surface of the volute, and between the coolant and the motor housing, thereby solving the insulation problem of the electronic water pump in the hydrogen fuel cell system, increasing the insulation performance of the whole machine, and reducing the risk of water leakage caused by inconsistent expansion coefficients of the materials of the electronic water pump components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To further illustrate the above and other advantages and features of various embodiments of the present invention, a more specific description of various embodiments of the present invention will be presented with reference to the accompanying drawings. It will be understood that these drawings only depict typical embodiments of the present invention and are therefore not to be considered as limiting the scope thereof. In the accompanying drawings, for clarity, identical or corresponding components will be represented by identical or similar reference numerals.

[0023] Figure 1 A schematic flow chart showing a method for manufacturing an electronic water pump according to an embodiment of the utility model;

[0024] Figure 2 A schematic diagram showing an exploded view of an electronic water pump according to an embodiment of the utility model; and

[0025] Figure 3 A schematic structural diagram of a volute of an electronic water pump according to an embodiment of the utility model is shown.

[0026] Reference numerals list

[0027] 101 Volute

[0028] 111 Insulation coating

[0029] 112 Liquid inlet

[0030] 113 liquid outlet

[0031] 114 Mounting holes

[0032] 102 Impeller

[0033] 103 Flange

[0034] 141 Rotor Assembly

[0035] 142 Waterproof sleeve

[0036] 143 stator parts

[0037] 144 Chassis

[0038] 105 Controller

[0039] 106 Back cover DETAILED DESCRIPTION

[0040] In the following description, the utility model is described with reference to various embodiments. However, those skilled in the art will recognize that the various embodiments can be implemented without one or more specific details or with other replacement and / or additional methods, materials or components. In other cases, well-known structures, materials or operations are not shown or described in detail to avoid blurring the utility model points of the utility model. Similarly, for the purpose of explanation, specific quantities, materials and configurations are set forth to provide a comprehensive understanding of the embodiments of the utility model. However, the utility model is not limited to these specific details. In addition, it should be understood that the various embodiments shown in the drawings are illustrative representations and are not necessarily drawn in correct proportions.

[0041] In this specification, reference to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present utility model. The phrase "in one embodiment" appearing in various places in this specification does not necessarily refer to the same embodiment.

[0042] It should be noted that the embodiments of the present invention describe the process steps in a specific order, but this is only for the purpose of illustrating the specific embodiment, rather than limiting the order of the steps. On the contrary, in different embodiments of the present invention, the order of the steps can be adjusted according to the adjustment of the process.

[0043] In order to solve the insulation problem of the electronic water pump in a fuel cell system such as a hydrogen fuel cell, the utility model provides a manufacturing method of an electronic water pump, an electronic water pump and a hydrogen fuel cell system, which provides an insulating layer in the part of the volute of the electronic water pump that contacts the coolant, so that the resistance between the inner wall of the volute and the outer shell of the volute is high, and thus no conduction occurs. At the same time, when the water pump is running, the coolant in the electronic water pump can also be insulated from the casing due to the insulating effect of the insulating coating, avoiding the risk of the casing being electrified.

[0044] The technical solution of the utility model is further described below in conjunction with the accompanying drawings of the embodiments.

[0045] Figure 1 The following is a schematic flow chart showing a method for manufacturing an electronic water pump according to an embodiment of the present invention. Figure 1 As shown, a method for manufacturing an electronic water pump comprises:

[0046] First, in step 001, assemble the motor. Assemble the housing, stator component, and rotor assembly together to form the motor, wherein the stator component is fixed inside the housing, and the rotor assembly is disposed in the inner hole of the stator component. In one embodiment of the utility model, in order to isolate the coolant, a watertight sleeve is further disposed between the rotor assembly and the stator component. Specifically, the watertight sleeve is installed in the inner hole of the stator component, and then the rotor assembly is disposed in the inner hole of the watertight sleeve;

[0047] Next, in step 002, install the controller. Fix the controller to the first end of the motor. In the embodiment of the present invention, the first end of the motor refers to the tail of the motor, that is, the end opposite to the end on which the impeller is installed. In one embodiment of the present invention, the controller is fixed to the first end of the motor by a threaded connection. It should be understood that in other embodiments of the present invention, the controller can also be fixed to the end of the motor by gluing, etc.;

[0048] Next, in step 003, the impeller is installed. The impeller is connected to the rotor assembly of the motor through a shaft so that the impeller can rotate under the drive of the motor. In one embodiment of the utility model, before installing the impeller, a flange is first installed at the second end of the housing;

[0049] Next, in step 004, spray an insulating layer. Spray an insulating coating on the inner surface of the volute. In one embodiment of the present invention, the insulating coating is made of polytetrafluoroethylene, and a liquid polytetrafluoroethylene solution is used during spraying. After being sprayed on the inner surface of the volute, the polytetrafluoroethylene solidifies to form a compact coating. In one embodiment of the present invention, the thickness of the insulating coating is 0.05 to 0.2 mm, preferably 0.1 mm; and

[0050] Finally, in step 005, the volute is fixed. The volute is fixed to the end of the motor so that the volute covers the impeller. As mentioned above, if a flange is provided, the volute is fixed to the flange. In one embodiment of the utility model, the volute is fixed to the second end of the motor by a threaded connection, such as a screw, a bolt, a screw, etc.

[0051] In order to protect the controller and improve the overall protection level of the electronic water pump, in one embodiment of the utility model, it also includes:

[0052] In step 006, a rear cover is installed. A rear cover is installed at the end of the first end of the motor housing, and the rear cover covers the controller. Similarly, in one embodiment of the utility model, the rear cover is connected to the motor housing by a threaded connection, such as screws, bolts, screws, etc.

[0053] It should be understood that in the embodiment of the present utility model, the various components of the electronic water pump, including the housing, stator component, rotor assembly, water-blocking sleeve, controller, impeller, flange, volute and rear cover can be made by common processes in the field, which will not be described in detail here. In addition, the installation sequence of the rear cover and volute, impeller and controller can be adjusted according to actual needs, and the assembly method of each component is realized by common processes in the field, which will not be described in detail here.

[0054] Figure 2 FIG. 1 is a schematic diagram of an exploded view of an electronic water pump according to an embodiment of the present utility model. Figure 2 As shown, the electronic water pump manufactured based on the manufacturing method as described above includes a volute 101, an impeller 102, a motor, and a controller 105. The volute 101 is fixed to the second end of the motor, and the impeller 102 is connected to the rotor component of the motor and is located inside the volute 101. The controller 105 is communicatively connected to the motor for controlling the motor.

[0055] Figure 3 The schematic diagram of the structure of a volute of an electronic water pump according to an embodiment of the utility model is shown. Figure 3As shown, the inner surface of the volute is provided with an insulating coating 111, and the volute 101 includes a liquid inlet 112 and a liquid outlet 113. As mentioned above, in one embodiment of the utility model, the volute 101 is fixed to the end of the motor by a threaded connection. Therefore, in one embodiment of the utility model, the volute further includes a mounting hole 114. The mounting hole 114 is used to install a threaded connector such as a bolt, thereby fixing the volute 101 to the motor.

[0056] In one embodiment of the present invention, the insulating coating is made of polytetrafluoroethylene. In one embodiment of the present invention, the insulating coating has a thickness of 0.05 to 0.2 mm, preferably 0.1 mm.

[0057] like Figure 2 As shown, the motor includes a rotor assembly 141, a stator component 143 and a housing 144, wherein the stator component 143 is fixed inside the housing 144, and the rotor assembly 141 is disposed in the inner hole of the stator component 143 and can rotate in the stator component 143. In one embodiment of the utility model, a watertight jacket 142 is further disposed between the stator component 143 and the rotor assembly 141, and the watertight jacket 142 is used to isolate the coolant.

[0058] like Figure 2 As shown, the impeller 102 is arranged to be opposite to the liquid inlet. At the same time, the impeller 102 is connected to the rotor assembly 141 through a shaft and is located inside the volute 101. This allows the shaft of the rotor assembly to drive the impeller 102 to rotate when the motor rotates. Since there is negative pressure in the front part of the impeller 102, the coolant can be sucked in from the liquid inlet 112 by the front part of the impeller 102. Due to inertia, when the impeller 102 rotates, the coolant will be thrown out. The rotation of the impeller 102 allows the coolant to circulate, and the coolant and the hydrogen fuel cell system achieve heat exchange to take away heat. At the same time, due to the insulating coating on the inner surface of the volute 101, the coolant does not directly contact the volute, let alone the casing, thereby effectively solving the problem of insulation between the coolant and the casing.

[0059] In an embodiment of the present invention, a flange 103 is further provided at the second end of the motor, and the volute 101 can be fixed to the motor via the flange 103 , for example.

[0060] The controller 105 is arranged at the first end of the motor, that is, the end thereof where the impeller is not installed. In one embodiment of the utility model, the controller 105 is fixed to the first end of the motor by a threaded connection.

[0061] In an embodiment of the present invention, the electronic water pump further comprises a rear cover 106 , wherein the rear cover 106 covers the controller 105 and is fixed to the end of the first end of the housing of the motor by means of a threaded connection.

[0062] Based on the electronic water pump as described above, the utility model further provides a hydrogen fuel cell system, which includes the electronic water pump as described above. The electronic water pump can be used in a cooling module of the hydrogen fuel cell system, for example, to pump out coolant.

[0063] The utility model sprays a certain thickness of insulating material, such as polytetrafluoroethylene, on the parts in contact with the coolant inside the fuel cell water pump components, so that the coolant running inside the electronic water pump of the fuel cell is insulated from the casing, thereby solving the problem of fuel cell insulation and the risk of water leakage caused by different expansion coefficients of components made of different materials.

[0064] Although various embodiments of the utility model are described above, it should be understood that they are presented as examples only and not as limitations. It is obvious to those skilled in the relevant art that various combinations, modifications and changes can be made thereto without departing from the spirit and scope of the utility model. Therefore, the breadth and scope of the utility model disclosed herein should not be limited by the exemplary embodiments disclosed above, but should only be defined according to the attached claims and their equivalents.

Claims

1. An electronic water pump, characterized in that: It includes a volute, and the inner surface of the volute is provided with an insulating coating to reduce the risk of water leakage caused by inconsistent expansion coefficients of components of the electronic water pump.

2. The electronic water pump according to claim 1, characterized in that: The material of the insulating coating is polytetrafluoroethylene.

3. The electronic water pump according to claim 1, characterized in that: The thickness of the insulating coating is 0.05 to 0.2 mm.

4. The electronic water pump according to claim 1, characterized in that: Also includes: Motor, including: chassis; a stator component fixed inside the casing; and a rotor assembly disposed in the inner hole of the stator component and configured to rotate in the stator component; an impeller connected to the rotor assembly via a shaft and located in the volute; and A controller is arranged at a first end of the motor, wherein the first end is an end of the motor where an impeller is not installed.

5. The electronic water pump according to claim 4, characterized in that: A water blocking sleeve is also included, and the water blocking sleeve is arranged between the rotor assembly and the stator component.

6. The electronic water pump according to claim 4, characterized in that: The controller is fixed to the first end of the motor by threaded connection.

7. The electronic water pump according to claim 4, characterized in that: The volute is fixed to the second end of the motor by threaded connection.

8. The electronic water pump according to claim 4, characterized in that: It also includes a flange, which is arranged between the volute and the casing of the motor.

9. The electronic water pump according to claim 4, characterized in that: It also includes a rear cover, which covers the controller and is fixed to the end of the first end of the motor housing by means of threaded connection.

10. A hydrogen fuel cell system, characterized in that: It comprises the electronic water pump as claimed in any one of claims 1 to 9.

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