Electric connection structure of electronic water pump

Abstract

The utility model discloses an electric connection structure of an electronic water pump. The electric connection structure comprises a driving circuit board, a pump shell, a rear end cover and a connector assembly. A plurality of terminal connecting through holes are formed in the driving circuit board, the connector assembly comprises a connector shell and a connector terminal, and the circuit board connecting end of the connector terminal is exposed out of the connector shell; the driving circuit board is accommodated and fixed in the pump shell, and the rear end cover is fixed at one end of the pump shell so as to cover the driving circuit board; a connector shell of the connector assembly is fixed on the rear end cover, and a circuit board connecting end of a connector terminal of the connector assembly penetrates through the rear end cover and then is correspondingly connected into a terminal connecting through hole of the driving circuit board in a pressing mode. The utility model mainly solves the problem of how to provide an electric connection structure for the electronic water pump. The electric connection structure which is reliable in connection, reasonable in structure, simple in assembly process and high in product yield is provided for the electronic water pump, the manufacturing difficulty of the electronic water pump is reduced, and the yield of the electronic water pump is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic water pump and its spare part technical field, concretely is a kind of electric connection structure of electronic water pump. BACKGROUND

[0002] Electronic water pump has higher output efficiency and can realize accurate flow control, so electronic water pump is widely used in automobile, household appliance and industrial equipment, especially new energy automobile usually has two or more electronic water pumps, and the electronic water pump is the power source of the entire cooling system of new energy automobile, and the power battery, drive motor and the like of new energy automobile need to rely on electronic water pump to drive coolant circulation cooling.

[0003] The electronic water pump in the prior art is usually provided with a driving circuit board, a stator assembly and a rotor assembly, wherein the driving circuit board is loaded with a master control, power electronic devices and necessary peripheral circuits, and can drive the stator assembly to generate a rotating magnetic field, thereby driving the rotor assembly to rotate.

[0004] The electronic water pump with the above structure needs to rely on external power supply, in addition, an external signal source may also be needed to provide a control signal, and / or to feed back an operating state signal to an external host computer.

[0005] Therefore, the driving circuit board of the electronic water pump needs to be connected with the external power source / signal source through a connector, which at least includes a positive and negative power supply terminal, and may also include a signal transmission port and a grounding terminal when needed. The above-mentioned port is connected to the corresponding interface position of the driving circuit board through a pin, and the pin is electrically connected to the driving circuit board, usually through soldering. However, by-products such as solder beads / rosin, process errors such as false welding / fake welding, and solder material consumption such as solder wire all belong to the inherent problems of the soldering connection method. In addition, since the soldering process needs to reserve enough space for chrome iron operation, and the pin and the driving circuit board need to be pre-installed in place before soldering, it will also increase the volume and weight of the electronic water pump.

[0006] Although the Press-Fit technology in the prior art can to some extent alleviate the above-mentioned problems by pressing the Press-Fit terminal into the electrical through hole of the driving circuit board, however, the Press-Fit technology also has the following technical problems: the Press-Fit terminal is poorly positioned, the Press-Fit terminal cannot be normally pressed in, and the other end of the Press-Fit terminal after being pressed in has a large degree of angular deflection or displacement, etc.

[0007] In summary, how to provide an electric connection structure for electronic water pump, which is reliable in connection, reasonable in structure, simple in assembly process and high in product yield, has become a problem to be solved. UTILITY MODEL CONTENTS

[0008] The utility model discloses a kind of electric connection structures of electronic water pump, it has the characteristics of reliable connection, reasonable structure, simple assembly process and high product yield.

[0009] To achieve the above object, the utility model provides the following technical scheme: an electric connection structure of electronic water pump, applied on electronic water pump, the electronic water pump at least includes drive circuit board, pump shell, rear end cover and connector assembly;A plurality of terminal connection through holes are formed in the drive circuit board, and the terminal connection through holes are respectively connected to the printed circuit of the drive circuit board;The connector assembly includes connector shell and connector terminal, and the connector terminal is provided with at least circuit board connecting end, at least a part of the connector terminal is fixed at the connector shell, and the circuit board connecting end of the connector terminal is exposed to the connector shell;The drive circuit board is accommodated and fixed in the pump shell, and the rear end cover is fixed at one end of the pump shell to cover the drive circuit board;The connector shell of the connector assembly is fixed on the rear end cover, and the circuit board connecting end of the connector terminal of the connector assembly is correspondingly crimped into the terminal connection through hole of the drive circuit board after passing through the rear end cover.

[0010] In the above technical solution, the rear end cover is formed with a connector profiling groove;The connector shell of the connector assembly is positioned and embeddedly fixed at the connector profiling groove of the rear end cover;The connector profiling groove of the rear end cover is provided with a connector through hole;The circuit board connecting end of the connector terminal of the connector assembly is correspondingly crimped into the terminal connection through hole of the drive circuit board after passing through the connector through hole of the rear end cover.

[0011] In the above technical solution, the connector profiling groove of the rear end cover is formed with a positioning screw column;The connector shell of the connector assembly is formed with a fixing lug, and a screw hole and a positioning counterbore are sequentially formed in the fixing lug and arranged coaxially;The positioning counterbore of the connector shell cooperates with the positioning screw column of the rear end cover to position the connector shell, and a screw is locked into the positioning screw column of the rear end cover after passing through the positioning counterbore of the connector shell.

[0012] In the above technical solution, the connector shell of the connector assembly is formed with a reinforcing rib around the circuit board connecting end of the connector terminal.

[0013] In the technical scheme, the circuit board connecting end of the connector terminal is sequentially arranged as a pre-insertion section, a contact section and a root strength section; when the circuit board connecting end of the connector terminal is crimped to the terminal connecting through hole of the driving circuit board, the pre-insertion section is pre-inserted into the terminal connecting through hole of the driving circuit board, and after the connector assembly is pressed, the contact section is crimped into the terminal connecting through hole of the driving circuit board and deformed, so as to be in interference fit with the terminal connecting through hole of the driving circuit board.

[0014] In the technical scheme, the contact section of the circuit board connecting end of the connector terminal is arranged as a fisheye shape.

[0015] In the technical scheme, the connector terminal of the connector assembly is sequentially arranged as an external connecting end, a buried body and the circuit board connecting end; the buried body of the connector terminal is buried and fixed in the connector housing in an integral injection molding manner; and the external connecting end of the connector terminal is shielded in the plug-in side of the connector housing.

[0016] In the technical scheme, the connector housing of the connector assembly is provided with a ventilation window; and the ventilation window communicates the internal space of the connector assembly and / or the rear end cover to the outside.

[0017] In the technical scheme, the rear end cover is provided with a first sealing structure, and the connector housing of the connector assembly is provided with a second sealing structure; when the connector housing of the connector assembly is fixed to the rear end cover, the second sealing structure of the connector housing cooperates with the first sealing structure of the rear end cover.

[0018] In the technical scheme, the electronic water pump electric connection structure further comprises a pump cavity shielding cover; the pump cavity shielding cover is accommodated and fixed in the pump shell, so as to isolate the driving circuit board and the pump cavity of the pump shell, and support the driving circuit board.

[0019] Compared with the prior art, the electronic water pump electric connection structure has the advantages that: the connector housing of the connector assembly is fixed to the rear end cover, and the circuit board connecting end of the connector terminal of the connector assembly is crimped into the terminal connecting through hole of the driving circuit board after passing through the rear end cover, so that the electronic water pump can provide a reliable connection, a reasonable structure, a simple assembly process and a high product yield, thereby providing a greater fault tolerance space for the design and manufacture of the electronic water pump, reducing the manufacturing difficulty of the electronic water pump and improving the yield of the electronic water pump. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of the utility model.

[0021] Figure 2 The exploded view of the utility model.

[0022] Figure 3 The utility model discloses an electronic water pump. Figure 2 The utility model discloses an electronic water pump.

[0023] Figure 4 The utility model discloses an electronic water pump.

[0024] Figure 5 The utility model discloses an electronic water pump.

[0025] Figure 6 The utility model discloses an electronic water pump.

[0026] The utility model discloses an electronic water pump. DETAILED DESCRIPTION

[0027] The utility model discloses an electronic water pump.

[0028] The utility model discloses an electronic water pump.

[0029] The utility model discloses an electronic water pump. Figures 1-6 The utility model discloses an electronic water pump.

[0030] The driving circuit board 1 is a printed circuit board (PCB), which carries a main control, power electronic devices and necessary peripheral circuits for driving the stator assembly of the electronic water pump to operate to generate a rotating magnetic field; the pump shell 2 is a shell made of engineering plastic or metal, which provides a structural support base for the electronic water pump and forms a pump cavity; and the rear end cover 3 is a metal cover plate for shielding and protecting the driving circuit board 1 and / or the stator assembly.

[0031] The driving circuit board 1 is provided with a plurality of terminal connection through holes 11, which are connected to the printed circuit of the driving circuit board 1. In this embodiment, the terminal connection through holes 11 are a plurality of circular copper through holes formed on the driving circuit board 1, and the copper layer thereof is connected to the printed circuit of the driving circuit board 1, so that the terminal connection through holes 11 are connected to the printed circuit of the driving circuit board 1.

[0032] The connector assembly 4 includes a connector housing 41 and a connector terminal 42. The connector housing 41 is a shell made of engineering plastic, which has insulation performance. The connector terminal 42 is a terminal made of metal (such as alloy copper), which has high mechanical hardness and good electrical conductivity. The connector terminal 42 is provided with at least a circuit board connecting end 421 located at the end of the connector terminal 42. At least a part of the connector terminal 42 is fixed to the connector housing 41, and the circuit board connecting end 421 of the connector terminal 42 is exposed outside the connector housing 41.

[0033] The driving circuit board 1 is accommodated and fixed in the pump shell 2, and the rear end cover 3 is fixed to one end of the pump shell 2 to cover the driving circuit board 1. In this embodiment, the rear end cover 3 is fixed to one end of the pump shell 2 by screws and covers the entire opening of the pump shell 2.

[0034] The connector housing 41 of the connector assembly 4 is fixed to the rear end cover 3, and the circuit board connecting end 421 of the connector terminal 42 of the connector assembly 4 is correspondingly crimped into the terminal connection through hole 11 of the driving circuit board 1 after passing through the rear end cover 3.

[0035] Further, the rear end cover 3 is formed with a connector profiling groove 31, specifically, the connector profiling groove 31 is a groove body integrally formed on the outer side surface of the rear end cover 3, and the outer contour of the groove body matches the outer contour of the connector housing 41; the connector housing 41 of the connector assembly 4 is positioned and embeddedly fixed at the connector profiling groove 31 of the rear end cover 3, facilitating the positioning and assembly of the connector assembly 4; the connector profiling groove 31 of the rear end cover 3 is provided with a connector through hole 311 integrally formed at the rear end cover 3; the circuit board connecting end 421 of the connector terminal 42 of the connector assembly 4 is correspondingly crimped to the terminal connecting through hole 11 of the driving circuit board 1 after passing through the connector through hole 311 of the rear end cover 3.

[0036] Further specifically, the rear end cover 3 is formed with a positioning screw column 32 at the connector profiling groove 31, specifically, the positioning screw column 32 is a cylindrical screw column integrally formed on the outer side surface of the rear end cover 3, and has a positioning function; the connector housing 41 of the connector assembly 4 is formed with a fixing lug 413, and the fixing lug 413 is sequentially formed with a screw hole 4132 and a positioning counterbore 4131 coaxially arranged, actually, the fixing lug 413, the screw hole 4132 and the positioning counterbore 4131 are integrally formed with the connector housing 41; the positioning counterbore 4131 of the connector housing 41 cooperates with the positioning screw column 32 of the rear end cover 3 to position the connector housing 41 (specifically, the positioning screw column 32 of the rear end cover 3 is inserted into the positioning counterbore 4131 of the connector housing 41), and the screw is locked into the positioning screw column 32 of the rear end cover 3 after passing through the positioning counterbore 4131 of the connector housing 41; in this way, not only the positioning of the connector housing 41 is achieved, but also the fixed installation of the connector housing 41 is achieved.

[0037] Specifically, the connector terminal 42 of the connector assembly 4 is sequentially arranged as an external connecting end 422, a buried body 423 and a circuit board connecting end 421, the external connecting end 422 is used for cooperating with an external terminal, the buried body 423 is used for fixing the connector terminal 42, actually, the external connecting end 422, the buried body 423 and the circuit board connecting end 421 are integrally formed; the buried body 423 of the connector terminal 42 is buried and fixed in the connector housing 41 in an integrally injection molding manner, that is, the connector terminal 42 is placed in a molding mold of the connector housing 41, and after the connector housing 41 is injection molded, the buried body 423 of the connector terminal 42 can be buried and fixed in the connector housing 41; the external connecting end 422 of the connector terminal 42 is shielded in the plug-in side (square frame in this embodiment) of the connector housing 41.

[0038] Further, the connector housing 41 of the connector assembly 4 is formed with a reinforcing rib 411 around the circuit board connecting end 421 of the connector terminal 42, and the reinforcing rib 411 is integrally injection molded with the connector housing 41 and located at the root of the exposed side of the circuit board connecting end 421 of the connector terminal 42, which can effectively prevent the circuit board connecting end 421 of the connector terminal 42 from being bent.

[0039] Further, the connector housing 41 of the connector assembly 4 is formed with a glue dispensing groove 415 around the external connecting end 422 of the connector terminal 42, and the glue dispensing groove 415 is a square groove body integrally injection molded with the connector housing 41, located at the plug-in side of the connector housing 41, and arranged around the external connecting end 422 of the connector terminal 42. Glue is dispensed at the glue dispensing groove 415 to fill the gap between the connector housing 41 and the connector terminal 42, thereby improving the waterproof performance of the connector assembly 4.

[0040] Please refer to Figure 6 Further, the circuit board connecting end 421 of the connector terminal 42 is sequentially configured as a pre-insertion section 4211, a contact section 4212, and a root strength section 4213, which are integrally formed and arranged from the free side of the circuit board connecting end 421. The pre-insertion section 4211 has an outer tangent circle diameter smaller than the diameter of the terminal connecting through hole 11 of the drive circuit board 1, so that the pre-insertion section 4211 is easily pre-inserted into the terminal connecting through hole 11. The contact section 4212 of the circuit board connecting end 421 of the connector terminal 42 is configured in a fish-eye shape, i.e., an oval-shaped through hole is formed in the middle of the contact section 4212, so that the contact section 4212 as a whole has a fish-eye shape. When the circuit board connecting end 421 of the connector terminal 42 is crimped to the terminal connecting through hole 11 of the drive circuit board 1: the pre-insertion section 4211 is pre-inserted into the terminal connecting through hole 11 of the drive circuit board 1, and after the connector assembly 4 is pressed, the contact section 4212 is crimped into the terminal connecting through hole 11 of the drive circuit board 1 and deformed, thereby being in interference fit with the terminal connecting through hole 11 of the drive circuit board 1.

[0041] Further, the connector housing 41 of the connector assembly 4 is provided with a breathable window 414, which connects the internal space of the connector assembly 4 and / or the rear end cover 3 to the outside; in this embodiment, the breathable window 414 is a grid structure integrally formed on the connector housing 41, and a waterproof breathable film is applied to the inner side of the breathable window 414, so that air molecules can pass through the breathable window 414, while liquid molecules are isolated from the breathable window 414. The breathable window 414 can balance the pressure difference between the inside and outside of the electronic water pump and prevent condensation inside the electronic water pump.

[0042] Further, the rear end cover 3 is provided with a first sealing structure 312, and the connector housing 41 of the connector assembly 4 is provided with a second sealing structure 412; when the connector housing 41 of the connector assembly 4 is fixed to the rear end cover 3, the second sealing structure 412 of the connector housing 41 cooperates with the first sealing structure 312 of the rear end cover 3; in this embodiment, the first sealing structure 312 is an annular groove integrally formed at the connector profiling groove 31, the second sealing structure 412 is an annular rib integrally formed at the connector housing 41, or the second sealing structure 412 is a sealing ring embedded in the first sealing structure 312 and abutting against the connector housing 41.

[0043] Further, the inner side of the rear end cover 3 is provided with a third sealing structure 33, and the end face of the pump shell 2 is provided with a fourth sealing structure 21; when the rear end cover 3 is fixed to the pump shell 2, the third sealing structure 33 of the rear end cover 3 cooperates with the fourth sealing structure 21 of the pump shell 2; in this embodiment, the fourth sealing structure 21 is an annular groove integrally formed at the end face of the pump shell 2, the third sealing structure 33 is an annular rib integrally formed at the rear end cover 3, or the third sealing structure 33 is a sealing ring embedded in the fourth sealing structure 21 and abutting against the rear end cover 3.

[0044] Further, the electric connection structure of the electronic water pump of this embodiment further comprises a pump cavity shielding cover 5, which is a metal cover plate; the pump cavity shielding cover 5 is accommodated and fixed in the pump shell 2 to isolate the driving circuit board 1 and the pump cavity of the pump shell 2 and support the driving circuit board 1; in this embodiment, the periphery of the pump cavity shielding cover 5 is in interference fit with the inner wall of the pump shell 2 to realize the sealing of the pump cavity; the pump cavity shielding cover 5 can be fixed in the pump shell 2 by screws, buckles or protrusion structures.

[0045] Further, a metal insert 416 is embedded in the screw hole 4132 of the connector housing 41, so that the screw cooperates with the insert 416 to avoid the influence of temperature change on the fastening degree of the screw by cooperating the metal insert 416 with the metal screw.

[0046] Further, the fixing lug 413 of the connector housing 41 and the positioning screw column 32 of the rear end cover 3 are provided with at least two groups, so that the connector housing 41 is multi-point positioned to ensure the positioning accuracy of the connector housing 41.

[0047] It can be understood that the gap between the pre-inserted section 4211 of the connector terminal 42 and the terminal connection through hole 11 of the drive circuit board 1 should be smaller than the fitting gap between the positioning counterbore 4131 of the connector shell 41 and the positioning screw column 32 of the rear end cover 3, and should also be smaller than the fitting gap between the first sealing structure 312 of the rear end cover 3 and the second sealing structure 412 of the connector shell 41, and should also be smaller than the fitting gap between the connector through hole 311 of the rear end cover 3 and the connector shell 41.

[0048] Further, positioning structures are arranged between the rear end cover 3 and the pump shell 2, in the embodiment, positioning columns and positioning holes are respectively formed at the side ears of the rear end cover 3 and the pump shell 2, and at least two groups of positioning columns and positioning holes are arranged to accurately position the rear end cover 3 and the pump shell 2; in the embodiment, the positioning columns are arranged at the side ears of the rear end cover 3, and the positioning holes are arranged at the side ears of the pump shell 2; the plane where the positioning columns are located can be treated as a descending plane, which is beneficial to cutting the positioning columns, and the root of the positioning column is provided with a fillet to increase the strength of the positioning column.

[0049] The electrical connection structure of the electronic water pump of the embodiment is manufactured as follows: first, the drive circuit board 1, the pump shell 2, the rear end cover 3, the pump cavity shielding cover 5, and the connector terminal 42 of the connector assembly 4 are pre-prepared; the connector terminal 42 is placed in the forming mold of the connector shell 41, and after the connector shell 41 is injection molded, the embedded body 423 of the connector terminal 42 is embedded and fixed in the connector shell 41, thereby obtaining the connector assembly 4; the pump cavity shielding cover 5 and the drive circuit board 1 are sequentially loaded into the pump shell 2, and the rear end cover 3 is fixed at one end of the pump shell 2 to cover the drive circuit board 1; then, the positioning screw column 32 of the rear end cover 3 cooperates with the positioning counterbore 4131 of the connector shell 41 to pre-position the connector shell 41 of the connector assembly 4, and at the same time, the pre-inserted section 4211 of the connector terminal 42 is pre-inserted into the terminal connection through hole 11 of the drive circuit board 1; after the connector assembly 4 is pressed (for example, the connector shell 41 of the connector assembly 4 is pressed by a servo press), the contact section 4212 of the connector terminal 42 is crimped into the terminal connection through hole 11 of the drive circuit board 1 and deformed, thereby being in interference fit with the terminal connection through hole 11 of the drive circuit board 1, at this time, a stable circuit connection structure is formed between the connector terminal 42 and the drive circuit board 1; finally, the connector shell 41 is fixed on the rear end cover 3 by screws, thereby completing the manufacturing process of the electrical connection structure of the electronic water pump of the embodiment.

[0050] The electronic water pump of the embodiment has the following advantages: the connector shell 41 of the connector assembly 4 is fixed on the rear end cover 3, and the circuit board connecting end 421 of the connector terminal 42 of the connector assembly 4 is correspondingly crimped into the terminal connecting through hole 11 of the driving circuit board 1 through the rear end cover 3, so that the electronic water pump can be provided with a reliable, reasonable, simple and high-yield electric connection structure, thereby providing a greater fault tolerance space for the design and manufacture of the electronic water pump, reducing the manufacturing difficulty of the electronic water pump, and improving the yield of the electronic water pump.

[0051] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An electric connection structure of an electronic water pump, applied to an electronic water pump, characterized in that, The electronic water pump comprises at least a driving circuit board, a pump shell, a rear end cover and a connector assembly; A plurality of terminal connection through holes are formed on the driving circuit board, and the terminal connection through holes are connected to the printed circuit of the driving circuit board respectively; The connector assembly comprises a connector shell and a connector terminal, the connector terminal is provided with at least a circuit board connecting end, at least a part of the connector terminal is fixed on the connector shell, and the circuit board connecting end of the connector terminal is exposed from the connector shell; The driving circuit board is accommodated and fixed in the pump shell, and the rear end cover is fixed on one end of the pump shell to cover the driving circuit board; The connector shell of the connector assembly is fixed on the rear end cover, and the circuit board connecting end of the connector terminal of the connector assembly is correspondingly crimped into the terminal connection through hole of the driving circuit board after passing through the rear end cover.

2. The electric connection structure of an electric water pump according to claim 1, characterized by A connector profiling groove is formed on the surface of the rear end cover; The connector shell of the connector assembly is positioned and embeddedly fixed in the connector profiling groove of the rear end cover; A connector through hole is formed in the connector profiling groove of the rear end cover; The circuit board connecting end of the connector terminal of the connector assembly is correspondingly crimped into the terminal connection through hole of the driving circuit board after passing through the connector through hole of the rear end cover.

3. The electric connection structure of an electric water pump according to claim 2, characterized by A positioning screw column is formed in the connector profiling groove of the rear end cover; A fixing lug is formed on the connector shell of the connector assembly, and a screw hole and a positioning counterbore coaxially arranged are sequentially formed in the fixing lug; The positioning counterbore of the connector shell cooperates with the positioning screw column of the rear end cover to position the connector shell, and a screw is locked into the positioning screw column of the rear end cover after passing through the positioning counterbore of the connector shell.

4. The electric connection structure of an electric water pump according to any one of claims 1 to 3, characterized in that, The connector shell of the connector assembly is formed with a reinforcing rib around the circuit board connecting end of the connector terminal.

5. The electric connection structure of an electric water pump according to any one of claims 1 to 3, characterized in that, The circuit board connecting end of the connector terminal is sequentially arranged as a pre-insertion section, a contact section and a root strength section; When the circuit board connecting end of the connector terminal is crimped into the terminal connection through hole of the driving circuit board, the pre-insertion section is pre-inserted into the terminal connection through hole of the driving circuit board, and the contact section is crimped into the terminal connection through hole of the driving circuit board and deformed after the connector assembly is pressed, so as to be interference-fitted with the terminal connection through hole of the driving circuit board.

6. The electric connection structure of an electric water pump according to claim 5, characterized by The contact section of the circuit board connecting end of the connector terminal is configured as a fish-eye shape.

7. The electric connection structure of an electric water pump according to any one of claims 1 to 3, characterized in that, The connector terminal of the connector assembly is sequentially arranged as an external connecting end, a buried body and the circuit board connecting end; The buried body of the connector terminal is integrally injection-molded and buried and fixed in the connector shell; The external connecting end of the connector terminal is shielded in the plug-in side of the connector shell.

8. The electric connection structure of an electric water pump according to any one of claims 1 to 3, characterized in that, The connector shell of the connector assembly is provided with a ventilation window; The ventilation window connects the internal space of the connector assembly and / or the rear end cover to the outside.

9. The electric connection structure of an electric water pump according to any one of claims 1 to 3, characterized in that, The rear end cover is provided with a first sealing structure, and the connector shell of the connector assembly is provided with a second sealing structure; The second sealing structure of the connector housing cooperates with the first sealing structure of the rear end cover when the connector housing of the connector assembly is fixed to the rear end cover.

10. The electric connection structure of an electric water pump according to any one of claims 1 to 3, characterized in that, The pump cavity shielding cover is accommodated and fixed in the pump shell to isolate the driving circuit board and the pump cavity of the pump shell and support the driving circuit board. The pump cavity shielding cover is accommodated and fixed in the pump shell to isolate the driving circuit board and the pump cavity of the pump shell and support the driving circuit board.

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