Electric Pump Heating Assembly With Spiral Flow Channels
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Solution Overview
Problem
Traditional electric pumps for power battery thermal management systems in cold environments have inefficiencies in heating liquids, requiring larger sizes and more use positions, which affect heating efficiency.
Innovation Solution
The electric pump design includes a pump body with a motor, impeller, and a liquid heating device featuring a cylindrical stator assembly, inner and outer heating flow channels partitioned by spiral partition plates, and a tubular heating element with thermal conductive insulating glue, allowing for extended heat exchange paths and efficient heating by utilizing thermal energy from the motor and control assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the radial size of pump body is increased to accommodate heating structure, then heating function is improved, but axial space requirement increases and device complexity increases
Solution Approach 1:
The heating flow channels are arranged in the radial direction around the motor, utilizing the radial space that would otherwise be unused. This transforms the heating structure from an axial arrangement to a radial arrangement, achieving heating functionality without increasing axial space requirements.
Solution Approach 2:
The pump body structure is designed to serve multiple functions: it acts as both the pump housing and the heating structure. The motor stator and pump body form integrated heating flow channels, eliminating the need for separate heating components and reducing overall device complexity.
2Adaptability or versatility
If traditional T-shaped pump design is used with separate heating structure, then heating capability is provided, but device complexity increases and more use positions are required
Solution Approach 1:
The heating structure is merged with the motor and pump body components. The motor stator, pump body, and heating flow channels are integrated into a single unified structure, eliminating separate heating components and reducing the number of parts that need to be assembled and maintained.
Solution Approach 2:
Existing components are designed to perform multiple functions: the motor stator serves both as a motor component and as a heating element; the pump body serves both as a structural housing and as a heating flow channel. This multi-functionality reduces overall device complexity.
3Productivity
If heating flow channel length is increased to improve heating efficiency, then heating efficiency is improved, but device volume increases
Solution Approach 1:
The heating flow channels are arranged in the radial direction around the motor, utilizing the circumferential space. This radial arrangement allows for longer effective heating path length within a compact volume, as the heat exchange surface is distributed around the motor perimeter rather than extending axially.
Solution Approach 2:
The heating flow channels are nested around the motor stator, utilizing the space between the stator and the pump body. This nested arrangement allows the heating channels to be positioned concentrically, maximizing heat exchange surface area within the available radial space without increasing overall device volume.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances heating efficiency by prolonging heat exchange time and increasing the length of heating flow channels, effectively raising the temperature of the battery while reducing the axial space required for the heating element.
Implementation Method 1
when a temperature is lower than a normal working temperature of a battery, perform electrothermal conversion, receive thermal energy generated by the motor, and heat a flowing liquid by thermal energy obtained by electrothermal conversion
Implementation Method 2
a tubular heating element with thermal conductive insulating glue
Implementation Method 3
receive thermal energy generated by the motor
Implementation Method 4
heat a flowing liquid by thermal energy obtained by electrothermal conversion and the thermal energy generated by the motor
Implementation Method 5
the inner heating flow channel space is provided with a plurality of spirally-disposed inner spiral partition plates spaced between an inner wall and an outer wall of the inner heating flow channel sleeve and configured to partition the inner heating flow channel space into a plurality of segments of inner spiral heating flow channels
Implementation Method 6
an impeller mounted in the pump body and driven by the motor
Data Source
AI summary
The present invention discloses an electric pump for a power battery thermal management system, including a pump body; a motor mounted in the pump body; an impeller mounted in the pump body and driven by the motor, and a liquid heating device mounted in the pump body and configured to heat a liquid sucked from a suction inlet by the impeller and discharged from a discharge outlet. The liquid heating device includes a motor heating component for heating the liquid, which is configured to heat the liquid by thermal energy generated by the motor, and a heating assembly sleeving an outer side of the motor heating component, having heating and cooling functions and configured to, when a temperature is lower than a normal working temperature of a battery, perform electrothermal conversion, receive the thermal energy generated by the motor, and heat the flowing liquid by the thermal energy obtained by the electrothermal conversion and the thermal energy generated by the motor, and when the temperature approaches to or reaches the normal working temperature of the battery, cool the motor by the flowing liquid.