Electronic liquid pump and charging gun line using same

Abstract

The utility model discloses an electronic liquid pump and a charging gun line using the same, and the electronic liquid pump comprises a pump body unit which comprises a pump shell and a base which are matched to form an impeller cavity, and an impeller assembly which is arranged in the impeller cavity; the impeller assembly comprises an impeller cover plate provided with a liquid inlet, an impeller bottom plate matched with the impeller cover plate to form a containing cavity and provided with a liquid outlet, and an impeller disc arranged in the containing cavity. The motor unit at least comprises a motor shell integrally formed with the base and an output shaft with one end extending out of the motor shell; one end of the output shaft is suitable for penetrating through the base, the impeller bottom plate and the impeller disc and then is inserted into the impeller cover plate; the opposite side end faces of the impeller cover plate and the impeller bottom plate are each provided with a liquid flow channel. A plurality of channels penetrating through the two axial side ends of the impeller disc are distributed on the impeller disc in the circumferential direction. The liquid flow channels in the impeller cover plate and the impeller bottom plate are suitable for being matched with the impeller disc to form a complete and closed liquid flow cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment, in particular to an electronic liquid pump and a charging gun line using the same. Background Art

[0002] With the rapid development of the electric vehicle industry, in order to shorten the waiting time for charging, the charging power of electric vehicles has been increasing. The increase in charging power has led to a gradual increase in the current carried by the charging gun line. The increase in the carrying current has made the heat dissipation requirements of the charging gun line more stringent. Traditional air cooling can no longer meet the large heat dissipation requirements of the charging gun line, while the excellent heat dissipation method of liquid cooling can just solve the large number of heat dissipation problems of the charging gun line. The excellent heat dissipation method of liquid cooling is mainly achieved by its core component, the electronic liquid pump.

[0003] At present, the industry generally uses crimping to fix the liquid cooling cable to the charging gun head and to fix the liquid cooling cable to the charging pile. The liquid cooling cable is used to supply the coolant. Due to the long length of the liquid cooling cable, the head of the electronic liquid pump used is relatively high. In this regard, the electronic water pump with a centrifugal impeller structure generally used in the prior art cannot meet the high head requirement of the liquid cooling of the charging gun line without increasing the power.

[0004] Therefore, in view of the high lift requirement of the electronic liquid pump used in the charging gun line, it is necessary to further improve its structure so that its lift can be increased without increasing the power. Utility Model Content

[0005] The first purpose of the utility model is to provide an electronic liquid pump to solve the technical problem of increasing its head.

[0006] The second object of the utility model is to provide a charging gun cable to solve the technical problem of extending the service life of the charging gun cable.

[0007] The electronic liquid pump of the utility model is realized in this way:

[0008] An electronic liquid pump, comprising:

[0009] A pump unit, comprising a pump housing and a base which cooperate to form an impeller cavity, and an impeller assembly arranged in the impeller cavity; the impeller assembly comprises an impeller cover plate provided with a liquid inlet, an impeller bottom plate adapted to form a receiving cavity with the impeller cover plate and provided with a liquid outlet, and an impeller disc arranged in the receiving cavity;

[0010] The motor unit comprises at least a motor housing integrally formed with the base, and an output shaft with one end extending out of the motor housing; one end of the output shaft is adapted to penetrate the base, the impeller bottom plate and the impeller disc and then be inserted into the impeller cover plate; and

[0011] Liquid flow channels are respectively provided on the side end surfaces facing each other of the impeller cover plate and the impeller bottom plate; a plurality of channels penetrating the two axial ends of the impeller disk are distributed along the circumferential direction; and the liquid flow channels on the impeller cover plate and the impeller bottom plate are suitable for respectively cooperating with the impeller disk to form a complete and closed liquid flow cavity, which is simultaneously connected to the liquid inlet and the liquid outlet.

[0012] In an optional implementation of the present invention, the liquid flow channels on the impeller cover plate and the impeller bottom plate are both C-shaped annular flow channels coaxially arranged with the impeller disk; and

[0013] The C-shaped annular flow channels on the impeller cover plate and the impeller bottom plate have the same structure and are arranged in a corresponding manner.

[0014] In an optional implementation of the present invention, the cross-section of the C-shaped annular flow channel along the axial direction of the output shaft is rectangular.

[0015] In an optional implementation of the present invention, the outer circular wall surface of the impeller disk is a continuous and closed circumferential surface.

[0016] In an optional implementation of the utility model, a plurality of blades with the same specifications and sizes are arranged at intervals on the impeller disk along the circumferential direction, and the channel is formed between every two adjacent blades.

[0017] In an optional implementation of the present invention, the C-shaped annular flow channel and the impeller disc are coaxially distributed; and

[0018] The radial dimension of the C-shaped annular flow channel is the same as the radial dimension of the blade.

[0019] In an optional implementation of the utility model, a positioning hole suitable for inserting the end of the output shaft is preset in the impeller cover plate;

[0020] The positioning hole is provided with a thrust piece which abuts against the end of the output shaft.

[0021] In an optional implementation of the utility model, a liquid discharge channel suitable for communicating with the liquid outlet is formed on the base;

[0022] The pump housing is also provided with a liquid injection pipe suitable for communicating with the liquid inlet, and the pump housing is also provided with a liquid discharge pipe suitable for communicating with the liquid discharge channel.

[0023] In an optional implementation of the utility model, the end surface of the impeller bottom plate facing away from the impeller is provided with a positioning protrusion suitable for being inserted into the base, and the base is correspondingly designed with an annular cavity for accommodating the positioning protrusion;

[0024] The liquid outlet extends and passes through the positioning protrusion, and the liquid discharge channel is located on the cavity wall of the annular cavity; and

[0025] The positioning protrusion is formed with a relief portion for making way for the drainage channel.

[0026] In an optional implementation of the present invention, a concave-convex matching limiting structure is further provided between the cavity wall of the annular cavity and the positioning protrusion.

[0027] The charging gun line of the utility model is realized as follows:

[0028] A charging gun cable comprises: the electronic liquid pump.

[0029] By adopting the above technical solution, the utility model has the following beneficial effects: the electronic liquid pump of the utility model and the charging gun line using the same form a complete and closed flow channel through the liquid flow channels respectively provided on the side end surfaces facing each other of the impeller cover plate and the impeller bottom plate, ensuring that most of the liquid is in the flow channel or in the impeller disc. After the liquid enters the impeller assembly from the liquid inlet, driven by the high-speed rotation of the impeller disc, it can be ensured that most of the liquid will accelerate along the flow channel and will not leak. After high-speed rotation, the pressure difference between the liquid inlet of the impeller cover plate and the liquid outlet of the impeller bottom plate increases, so that the liquid achieves a high head effect when discharged from the liquid outlet of the impeller bottom plate under the impeller cover. The electronic liquid pump is the power of the coolant circulation in the charging gun line, and its performance determines the cooling effect of the coolant, thereby extending the service life of the charging gun line and improving the safety of the use of the charging gun line by increasing the head of the electronic liquid pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of the electronic liquid pump of the utility model;

[0031] Figure 2 This is a schematic diagram of the explosion decomposition structure of the electronic liquid pump of the utility model;

[0032] Figure 3 It is a partial structural schematic diagram of the impeller assembly of the electronic liquid pump of the utility model;

[0033] Figure 4 This is a schematic structural diagram of the impeller cover plate of the electronic liquid pump of the utility model from a first perspective;

[0034] Figure 5 It is a second perspective structural schematic diagram of the impeller cover plate of the electronic liquid pump of the utility model;

[0035] Figure 6 This is a schematic structural diagram of the impeller base plate of the electronic liquid pump of the utility model from a first perspective;

[0036] Figure 7It is a second perspective structural schematic diagram of the impeller bottom plate of the electronic liquid pump of the utility model;

[0037] Figure 8 It is a structural schematic diagram of the impeller disk of the electronic liquid pump of the utility model;

[0038] Fig. 9 It is a structural schematic diagram of the motor housing of the electronic liquid pump of the utility model;

[0039] Fig.10 It is a schematic diagram of the matching structure of the base and the impeller bottom plate of the electronic liquid pump of the utility model.

[0040] In the figure: pump housing 1, discharge pipe 11, injection pipe 12, impeller cover plate 2, liquid inlet 21, positioning hole 22, impeller base plate 3, liquid outlet 31, positioning protrusion 32, avoidance portion 33, shaft hole 34, recessed structure 35, accommodating groove 36, impeller disk 4, blades 41, channel 42, liquid flow channel 5, thrust member 6, motor housing 7, base 8, annular cavity 81, discharge channel 82, protrusion structure 83, output shaft 9. DETAILED DESCRIPTION

[0041] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0042] Embodiment 1:

[0043] See also Figures 1 to 10 As shown, this embodiment provides an electronic liquid pump, including: a pump body unit and a motor unit used in conjunction with each other; wherein the motor unit is used to generate power for the operation of the pump body unit.

[0044] Specifically, the pump body unit includes a pump housing 1 and a base 8 that cooperate to form an impeller cavity, and an impeller assembly disposed in the impeller cavity. The impeller cavity is mainly formed in the pump housing 1, which is generally a cylindrical structure, and the base 8 is mainly used to fix one side end of the impeller assembly.

[0045] In more detail, the impeller assembly includes an impeller cover plate 2 provided with a liquid inlet 21, an impeller base plate 3 adapted to form a receiving chamber with the impeller cover plate 2 and provided with a liquid outlet 31, and an impeller disc 4 arranged in the receiving chamber. The impeller disc 4 operates in the receiving chamber. In conjunction with the accompanying drawings, an optional implementation is given as an example. For the impeller cover plate 2 and the impeller base plate 3, the two can be optionally fastened together by multiple screws. In this case, the impeller assembly can be assembled as an integral component when assembled into the overall electronic liquid pump, thereby improving the assembly efficiency. It should be noted that when the impeller assembly is assembled and fixed in the impeller cavity, the impeller base plate 3 faces the base 8, and the impeller cover plate 3 faces away from the base 8, so that the liquid entering the impeller cavity first enters the impeller cover plate 2, and then enters the impeller base plate 3 after passing through the impeller disc 4.

[0046] Taking one case as an example with reference to the accompanying drawings, regarding the cooperation between the impeller disk 4, the impeller cover plate 2 and the impeller base plate 3, a receiving groove 36 for accommodating the impeller disk is recessed on the side end surface of the impeller base plate 3 facing the impeller cover plate 2; and the depth of the receiving groove 36 is slightly greater than the thickness of the impeller disk 4, and the impeller cover plate 2 is mainly used to form a cover for the receiving groove 36, so that the impeller disk 4 can reliably operate in the receiving groove 36.

[0047] It should also be noted that the impeller cover plate 2 and the impeller bottom plate 3 are respectively provided with liquid flow channels 5 on the side end surfaces facing each other; the impeller disc 4 is provided with a plurality of channels 42 penetrating the two axial ends thereof in the circumferential direction; and the liquid flow channels 5 on the impeller cover plate 2 and the impeller bottom plate 3 are suitable for respectively cooperating with the impeller disc 4 to form a complete and closed liquid flow cavity, which is simultaneously connected with the liquid inlet 21 and the liquid outlet 31. Under this structure, it is ensured that most of the liquid is in the flow channel or in the impeller disc 4. After the liquid enters the impeller assembly from the liquid inlet 21, driven by the high-speed rotation of the impeller disc 4, it can be ensured that most of the liquid will accelerate along the flow channel without leakage. After high-speed rotation, the pressure difference between the liquid inlet 21 of the impeller cover plate 2 and the liquid outlet 31 of the impeller bottom plate 3 increases, so that the liquid achieves a high lift effect when discharged from the liquid outlet 31 of the impeller bottom plate 3 under the impeller cover.

[0048] The outer wall surface of the impeller disk 4 used in this embodiment is a continuous and closed circumferential surface. A plurality of blades 41 of the same size are arranged at intervals along the circumferential direction of the impeller disk 4, and a channel 42 is formed between each two adjacent blades 41.

[0049] Based on the above situation, an optional implementation is given in conjunction with the accompanying drawings. The liquid flow channels 5 on the impeller cover plate 2 and the impeller bottom plate 3 are both C-shaped annular flow channels coaxially arranged with the impeller disk 4; and the C-shaped annular flow channels on the impeller cover plate 2 and the impeller bottom plate 3 have the same structure and are arranged in direct correspondence. The liquid flow channel 5 used in this embodiment is a C-shaped annular shape, that is, the length of the entire C-shaped annular shape spans a circumferential angle of less than 360°.

[0050] For example, an optional embodiment is provided in which the cross section of the C-shaped annular flow channel along the axial direction of the output shaft 9 is rectangular. The rectangular flow channel has a larger area than the semicircular flow channel, and can accommodate more liquid into the liquid flow channel 5, so that the impeller disc 4 will not dry grind, and can fill the entire cavity faster, always maintaining a high-speed rotation state, thereby achieving a high lift effect.

[0051] In addition, in a specific optional implementation, the C-shaped annular flow channel is coaxially distributed with the impeller disc 4; and the radial dimension of the C-shaped annular flow channel is the same as the radial dimension of the blade 41. Under this design, after the liquid enters the impeller cavity, driven by the high-speed rotation of the impeller disc 4, it can be ensured that most of the liquid will accelerate along the flow channel without leakage, and the liquid is quickly sucked into the liquid flow channel 5 of the impeller bottom plate 3 by the impeller disc 4. The liquid speeds up with the rotation of the impeller disc 4, and the effect of high lift can be achieved.

[0052] In addition, considering the matching problem between the impeller assembly and the output shaft 9, a positioning hole 22 suitable for the end of the output shaft 9 to be inserted is preset in the impeller cover plate 2; the positioning hole 22 is provided with a thrust piece 6 that is matched with the end of the output shaft 9. In this embodiment, in order to ensure the high head performance of the electronic liquid pump, the axial clearance between the end of the output shaft 9 and the positioning hole 22 of the impeller cover plate 2 needs to be as small as possible, so that it is easy for the output shaft 9 to rub against the impeller cover plate 2, causing the impeller cover plate 2 to wear, thereby causing the output shaft 9 to move forward, affecting the head of the electronic liquid pump. The thrust piece 6 here can effectively prevent the mutual wear between the end of the output shaft 9 and the impeller cover plate 2 when achieving high head. It should be noted that the material of the thrust piece 6 in this embodiment is different from that of the impeller cover plate 2, and the thrust piece 6 can be made of wear-resistant metal material.

[0053] Next, the motor unit is described, which includes at least a motor housing 7 integrally formed with the base 8, and an output shaft 9 with one end extending out of the motor housing 7; one end of the output shaft 9 is suitable for passing through the base 8, the impeller bottom plate 3 and the impeller disk 4 and then inserted into the impeller cover plate 2.

[0054] Regarding the motor unit of this embodiment, it should also be noted that it can optionally adopt any mature means in the prior art, which generally includes a stator assembly and a rotor assembly used in conjunction. The stator assembly is accommodated in the motor housing 7 to form a dry cavity; the rotor assembly is accommodated in the cavity formed by the stator assembly and the base 8 to form a wet cavity, which is used to contain liquid. Of course, it can be understood that the motor unit also includes a controller to realize the control of the operating state of the motor unit.

[0055] In terms of an implementation for ease of processing, the base 8 and the motor housing 7 are integrally molded by injection molding. In this case, for the overall electronic liquid pump, it is only necessary to assemble the pump housing 1 and the motor housing 7 by means of, for example but not limited to, screws to quickly complete the assembly of the motor liquid pump, and there is no need to consider an assembly problem between the base 8 and the motor housing 7 body, and the integral injection molding structure has higher strength and stability.

[0056] Here, an optional implementation is specifically described in conjunction with the accompanying drawings. Regarding the specific fixing method between the impeller unit and the base 8, this embodiment has the following design:

[0057] The end surface of the impeller bottom plate 3 facing away from the impeller is provided with a positioning protrusion 32 suitable for being inserted into the base 8, and the corresponding base 8 is designed with an annular cavity 81 for accommodating the positioning protrusion 32; the liquid outlet 31 extends and passes through the positioning protrusion 32, and the drainage channel 82 is located on the cavity wall of the annular cavity 81; and the positioning protrusion 32 is formed with an avoidance portion 33 for making way for the drainage channel 82. For an optional situation, in conjunction with the accompanying drawings, the positioning protrusion 32 can be a cylindrical structure that is adapted to the annular cavity 81 and arranged coaxially with the impeller bottom plate 3, and the avoidance portion 33 can be understood as a small fan-shaped structure cut off from the cylindrical structure, and the output shaft 9 must pass through the impeller bottom plate 3, so the output shaft 9 also needs to pass through the positioning protrusion 32, and the cut-off small fan-shaped structure at this time will not extend to the axial hole 34 on the positioning protrusion 32 that matches the output shaft 9. Here, the cooperation between the positioning protrusion 32 and the annular cavity 81 allows a reliable cooperation between the impeller bottom plate 3 and the base 8, and the design of the avoidance portion 33 ensures that the positioning protrusion 32 does not block the drainage channel 82 on the base 8, thereby ensuring the rapid discharge of the liquid in the base 8 and further ensuring high lift.

[0058] On the basis of the above structure, a concave-convex limiting structure is further provided between the cavity wall of the annular cavity 81 and the positioning protrusion 32. Here, a protrusion structure 83 can be designed on the cavity wall of the annular cavity 81, and a recessed structure 35 adapted to the protrusion mechanism can be designed on the positioning protrusion 32. The design of the limiting structure here ensures that when the base 8 and the impeller bottom plate 3 are assembled in place, the liquid flowing out of the liquid outlet 31 on the impeller bottom plate 3 can smoothly enter the drainage channel 82 on the base 8.

[0059] Furthermore, in order to enable the base 8 of this embodiment to be used in conjunction with the impeller unit, a drainage channel 82 suitable for communicating with the liquid outlet 31 is formed on the base 8, and the drainage channel 82 forms an outflow channel for the liquid. The drainage channel 82 is preferably a semi-enclosed structure. The pump housing 1 is also provided with a liquid injection pipe 12 suitable for communicating with the liquid inlet 21, and the pump housing 1 is also provided with a drainage pipe 11 suitable for communicating with the drainage channel 82. Here, when the pump housing 1 and the motor housing 7 are assembled in place, the liquid injection pipe 12 is arranged on the top wall of the pump housing 1 facing the impeller cover plate 2, and the drainage pipe 11 is arranged on the side wall of the pump housing 1, so that the drainage channel 82 corresponds to the drainage pipe 11, so as to facilitate the accumulation of liquid in the wet cavity. Under the connection of short-term pressure, the liquid in the wet cavity passes through the drainage channel 82 to reach the drainage pipe 11 faster, thereby improving the drainage efficiency while improving the head.

[0060] On the basis of the above situation, it is also necessary to explain that matching holes for adapter screws are designed on the motor housing 7 and the pump housing 1. In this regard, in an optional implementation, the matching holes on the motor housing 7 and the pump housing 1 are arranged in an uneven structure, thereby achieving an anti-mistake effect and ensuring that the discharge channel 82 on the base 8 and the discharge pipe 11 on the pump housing 1 are accurately aligned.

[0061] In summary, for the electronic liquid pump of this embodiment, after the liquid (when the electronic liquid pump is used in the charging gun line, the liquid is also the coolant) enters the pump housing 1 from the filling pipe 12, the liquid passes through the impeller assembly, and then under the action of the pressure in the cavity, the liquid flows through the discharge channel 82 of the base 8, and finally is discharged from the discharge pipe 11 of the pump housing 1.

[0062] Embodiment 2:

[0063] Based on the electronic liquid pump of Example 1, this embodiment provides a charging gun cable, which includes the electronic liquid pump of Example 1.

[0064] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0065] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0066] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0068] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0069] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. An electronic liquid pump, characterized in that: include: A pump unit, comprising a pump housing and a base which cooperate to form an impeller cavity, and an impeller assembly arranged in the impeller cavity; the impeller assembly comprises an impeller cover plate provided with a liquid inlet, an impeller bottom plate adapted to form a receiving cavity with the impeller cover plate and provided with a liquid outlet, and an impeller disc arranged in the receiving cavity; The motor unit comprises at least a motor housing formed integrally with the base, and an output shaft with one end extending out of the motor housing; One end of the output shaft is suitable for passing through the base, the impeller bottom plate and the impeller disc and then being inserted into the impeller cover plate; as well as Liquid flow channels are respectively provided on the side end surfaces facing each other of the impeller cover plate and the impeller bottom plate; a plurality of channels penetrating the two axial ends of the impeller disk are distributed along the circumferential direction; and the liquid flow channels on the impeller cover plate and the impeller bottom plate are suitable for respectively cooperating with the impeller disk to form a complete and closed liquid flow cavity, which is simultaneously connected to the liquid inlet and the liquid outlet.

2. The electronic liquid pump according to claim 1, characterized in that: The liquid flow channels on the impeller cover plate and the impeller bottom plate are both C-shaped annular flow channels arranged coaxially with the impeller disk; and The C-shaped annular flow channels on the impeller cover plate and the impeller bottom plate have the same structure and are arranged in a corresponding manner.

3. The electronic liquid pump according to claim 2, characterized in that: The cross section of the C-shaped annular flow channel along the axial direction of the output shaft is rectangular.

4. The electronic liquid pump according to claim 2 or 3, characterized in that: The outer circumferential wall surface of the impeller disk is a continuous and closed circumferential surface.

5. The electronic liquid pump according to claim 2 or 3, characterized in that: The impeller disk is provided with a plurality of blades of the same specification and size at intervals along the circumferential direction, and the channel is formed between every two adjacent blades.

6. The electronic liquid pump according to claim 5, characterized in that: The C-shaped annular flow channel is coaxially distributed with the impeller disk; and The radial dimension of the C-shaped annular flow channel is the same as the radial dimension of the blade.

7. The electronic liquid pump according to claim 1, characterized in that: The impeller cover plate is preset with a positioning hole suitable for the end of the output shaft to be inserted; The positioning hole is provided with a thrust piece which abuts against the end of the output shaft.

8. The electronic liquid pump according to claim 1, characterized in that: The base is formed with a liquid discharge channel adapted to communicate with the liquid outlet; The pump housing is also provided with a liquid injection pipe suitable for communicating with the liquid inlet, and the pump housing is also provided with a liquid discharge pipe suitable for communicating with the liquid discharge channel.

9. The electronic liquid pump according to claim 8, characterized in that: The end surface of the impeller bottom plate facing away from the impeller is provided with a positioning protrusion suitable for being inserted into the base, and the base is correspondingly designed with an annular cavity for accommodating the positioning protrusion; The liquid outlet extends and passes through the positioning protrusion, and the liquid discharge channel is located on the cavity wall of the annular cavity; and The positioning protrusion is formed with a relief portion for making way for the drainage channel.

10. The electronic liquid pump according to claim 9, characterized in that: A concave-convex matching limiting structure is also provided between the cavity wall of the annular cavity and the positioning protrusion.

11. A charging gun cable, characterized in that: include: The electronic liquid pump according to any one of claims 1 to 10.

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