Battery Heating Circuit Layout for Higher Coolant Flow
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Solution Overview
Problem
Existing battery temperature raising systems, such as those using engine cooling water circuits, face challenges in ensuring sufficient flow rate and resistance reduction for effective battery heating, leading to inefficient temperature increase.
Innovation Solution
A battery temperature raising system with a parallel configuration of heating paths for the battery cooling water circuit, including a first path for engine exhaust heat, a second path for air heating, and a third path for heater heating, with a bypass option to reduce resistance and enhance flow rate, allowing efficient battery temperature elevation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the battery heat exchanger and heater core are connected in series in the engine cooling water circuit, then the heater core can heat air blown into the vehicle compartment, but the flow rate of cooling water to the battery heat exchanger cannot be sufficiently ensured, so that the temperature of the battery cannot be sufficiently increased
Solution Approach 1:
The engine cooling water circuit is divided into multiple independent parallel paths: a first path connecting the battery heat exchanger directly to the water pump, and a second path connecting the heater core to the water pump. This segmentation allows cooling water to be distributed to different components simultaneously without the flow restrictions of a series configuration, ensuring sufficient flow rate to the battery heat exchanger while still enabling heater core operation.
2Ease of operation
If the battery heat exchanger and heater core are connected in series, then the heater core can function, but the resistance of the circuit increases, reducing the flow rate to the battery heat exchanger
Solution Approach 1:
The circuit is segmented into parallel paths with the water pump positioned to receive flow from both paths independently. This reduces overall circuit resistance compared to a series configuration, as parallel connections provide multiple flow routes, thereby increasing total flow rate while maintaining heater core functionality.
Solution Approach 2:
The circuit topology transitions from a one-dimensional series arrangement to a two-dimensional parallel network, adding a new dimension to the flow paths. This dimensional change allows simultaneous flow to multiple components without the cumulative resistance penalties of series connections.
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 system effectively improves battery temperature raising ability by ensuring sufficient flow rate and reducing resistance, enabling efficient heating using engine exhaust heat and supplemental heater assistance.
Implementation Method 1
a battery cooling water circuit configured to cool or heat a battery to an appropriate temperature, and an engine cooling water circuit that cools an engine
Implementation Method 2
the first path is connected in parallel with the second path... the resistance of the first path for heating the battery cooling water circuit is reduced
Implementation Method 3
a second path for heating air blown into the vehicle compartment
Implementation Method 4
the resistance of the first path for heating the battery cooling water circuit is reduced, the flow rate of the first path can be sufficiently ensured
Data Source
AI summary
The battery temperature raising system is a battery temperature raising system that raises the temperature of a battery mounted on a vehicle, and includes a battery cooling water circuit configured to cool or heat the battery to an appropriate temperature, and an engine cooling water circuit that cools the engine. The engine cooling water circuit has a first path for heating the battery cooling water circuit, a second path for heating air blown into the vehicle compartment, and a third path for heating by the heater. The first path is connected in parallel with the second path.