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CN-122014631-A - Pump with electric drive, coolant circuit and vehicle

CN122014631ACN 122014631 ACN122014631 ACN 122014631ACN-122014631-A

Abstract

The invention relates to a pump (100) for conveying a liquid from a suction side (101) to a pressure side (102) of the pump (100), wherein the pump (100) has an electric drive with a stator (110) and a rotor (120) mechanically connected to a conveying means (125), wherein at least one heat-conducting element (140, 145) is arranged at least along a face of the stator (110), said heat-conducting element being designed to absorb heat from at least one further component of the stator (110) and/or the pump (100), in particular from a power electronics (130) for energizing the stator, and to emit it to the liquid conveyed by the pump (100).

Inventors

  • LANDES EWGENIJ
  • G. Libu
  • J. WALTER
  • S. HANSEN
  • S. Kohler

Assignees

  • 罗伯特·博世有限公司

Dates

Publication Date
20260512
Application Date
20251112
Priority Date
20241112

Claims (12)

  1. 1. A pump (100) for transporting a liquid from a suction side (101) to a pressure side (102) of the pump (100), wherein the pump (100) has an electric drive with a stator (110) and a rotor (120) mechanically connected to a transport mechanism (125), wherein at least one heat-conducting element (140, 145) is arranged at least along a face of the stator (110), said heat-conducting element being designed to absorb heat from at least one further component of the stator (110) and/or the pump (100), in particular from a power electronics (130) for energizing the stator, and to emit it to the liquid transported by the pump (100).
  2. 2. Pump (100) according to claim 1, wherein the at least one heat conducting element (140, 145) is in thermal contact with the pressure side (102) of the pump (100) and/or is arranged at least partially on a face (151, 152) of the pump (100) defining a wet chamber (103) of the pump (100) and/or on a face (114) of the stator (110) facing away from the rotor (120).
  3. 3. Pump (100) according to claim 1 or 2, wherein the stator (110) is arranged in a dry chamber (104) of the pump (100) and the rotor (120) is arranged in a wet chamber (103) of the pump (100), wherein the dry chamber (104) is not rinsed with liquid and the wet chamber (103) is at least partially rinsed with liquid.
  4. 4. The pump (100) according to any one of the preceding claims, wherein the at least one heat conducting element (140, 145) has a structure (142) with an enlarged surface at least in a region configured for transferring heat from the stator (110) to the at least one heat conducting element (140, 145) and/or in a region configured for transferring heat from the at least one heat conducting element (140, 145) to the liquid and/or in a region configured for transferring heat from the at least one further component to the at least one heat conducting element (140, 145).
  5. 5. Pump (100) according to any one of the preceding claims, wherein the at least one heat-conducting element (140, 145) has at least one punched part and/or at least one deep-drawn part and/or at least one plate and/or die cast part.
  6. 6. The pump (100) according to any one of the preceding claims, wherein the at least one thermally conductive element (140, 145) has at least one metal, in particular one or more from the group comprising aluminum, iron and copper and alloys thereof.
  7. 7. The pump (100) according to any one of the preceding claims, wherein the at least one thermally conductive element (140, 145) has at least one housing (140) receiving the stator (110) and/or a cover (145) at least partially closing an opening in the housing (140).
  8. 8. The pump (100) according to any one of the preceding claims, wherein the stator (110) is at least partially embedded in an electrically insulating solid material (150) together with at least one thermally conductive element (140, 145).
  9. 9. The pump (100) of claim 8, wherein a shaft (170) carrying the rotor (110) is at least partially embedded in an electrically insulating solid material (150).
  10. 10. The pump (100) according to claim 8 or 9, wherein the electrically insulating solid material (150) has a higher thermal conductivity than air, and/or wherein the electrically insulating solid material (150) has one or more from the group consisting of thermoplastic plastics, thermosetting plastics and ceramic materials.
  11. 11. A coolant circuit with coolant and at least one pump (100) according to any of the preceding claims, wherein at least one pump (100) is set up for conveying coolant in the coolant circuit.
  12. 12. Vehicle, in particular at least partially electrically drivable vehicle, having a coolant circuit according to claim 11 and/or at least one pump (100) according to any one of claims 1 to 10.

Description

Pump with electric drive, coolant circuit and vehicle Technical Field The invention relates to a pump with an electric drive, and to a coolant circuit and a vehicle with such a pump. Background In partially electrically driven vehicles (e.g., hybrid vehicles) and fully electrically driven vehicles, electrically driven cooling water pumps can be used. In this case, depending on the system configuration, a plurality of pumps for different cooling circuits can be installed, with different delivery rate presets and temperature presets. At the same time, the pump should be as small as possible and be able to achieve large delivery volumes. In this case, the problem arises that waste heat cannot be dissipated effectively in a small installation space with a large power, since the efficiency of the pump is also significantly impaired, typically with a large delivery rate. Since the pump is partially mounted such that the cooling of the electronics (circuit board) and/or stator by the outer housing of the pump is insufficient, further more costly (active) cooling measures may be necessary. Disclosure of Invention According to the invention, a pump with an electric drive and a coolant circuit and a vehicle with such a pump are proposed, which have the features of the independent claims. Advantageous embodiments are the subject matter of the dependent claims and the following description. The invention relates to a pump having an electric drive for conveying a liquid from a suction side to a pressure side of the pump, wherein the electric drive has a stator and a rotor which is mechanically connected to or is part of a conveying means, wherein at least one heat-conducting element is arranged along at least one face of the stator, said heat-conducting element being designed to absorb heat from the stator and/or from at least one further component of the pump, in particular from power electronics for energizing the stator, and to emit it to the liquid conveyed by the pump. Thereby, heat generated by electrical losses in the stator or at least one further component is efficiently dissipated without providing separate cooling. In addition, leakage flows ("hydraulic shorts") of the supplied liquid, which are returned from the pressure side to the suction side of the pump and are conventionally used in a targeted manner for cooling the stator, can be reduced or preferably completely dispensed with, without damaging the cooling of the stator or other components. Thereby, the efficiency is greatly improved compared to the conventional pump. For example, in conventional pumps these leakage flows (which are specifically intended) may be up to 30% of the amount of liquid supplied, whereas in the embodiments of the invention these leakage flows are reduced or not provided at all. In addition, the dissipation of heat into the liquid which is originally transported gives rise to the advantage that, even in the case of high transport powers and thus also in the case of high thermal loads, high cooling powers, which are automatically caused by the high volume flows of the transported medium for cooling, are also available. In particular, pump housings which are conventionally designed for heat dissipation at high cost can be designed economically without having to dispense with effective heat dissipation and in particular the pump can be arranged, installed and operated independently of external installation conditions, for example in a vehicle. According to at least one embodiment, the stator is at least partially embedded in the electrically insulating solid material together with the at least one heat-conducting element, for example by injection molding. According to at least one embodiment, the electrically insulating solid material has a higher thermal conductivity than air. According to at least one embodiment, the electrically insulating solid material has one or more from the group consisting of thermoplastic plastics, thermosetting plastics and ceramic materials. Thus, for example, the stator can be cast together with the at least one heat-conducting element in the plastic matrix, which particularly advantageously influences the electrical and thermal properties. In particular, it is thereby also possible to separate the wet chamber from the dry chamber without additional components (without additional seals) and to optimize the heat transfer between the stator and the heat-conducting element at the same time, since the thermally insulating air layer is replaced by a plastic which enables a more efficient heat transfer. According to at least one embodiment, the at least one heat-conducting element is in thermal contact with the pressure side of the pump or with a fluid channel on the pressure side. This makes it possible to better utilize the structural situation without enlarging the installation space of the pump. As a result of the heat dissipation in the fluid channel towards the pressure side, a cooling power is genera