Traction Battery Heating Circuit for Low-Temperature Driving
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Solution Overview
Problem
Traction batteries face significant discharge capacity degradation and inability to charge in low-temperature environments, limiting their use, and conventional heating methods require the motor to stop driving, causing noise and reducing motor lifespan.
Innovation Solution
A battery heating apparatus with a heating module and control module that forms loops for discharge and charge, allowing the traction battery to heat while driving by using an energy storage element, enabling continuous vehicle operation and voltage regulation during charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a motor is used to heat the traction battery, then the battery can be heated in low-temperature environments, but the motor cannot drive the vehicle to run
Solution Approach 1:
The battery heating apparatus enables the traction battery to serve dual functions: both as the power source for vehicle operation and as the object to be heated. By forming discharge and charge loops within the battery system itself, the invention eliminates the need to separate heating function from driving function, allowing the battery to be heated while simultaneously powering the motor to drive the vehicle.
2Temperature
If conventional heating methods are used, then the battery can be heated, but the motor cannot implement heating in driving
Solution Approach 1:
The battery heating apparatus enables the traction battery to heat itself through controlled discharge and charge cycles. The battery serves as both the heat source and the object to be heated, eliminating the need for external heating devices. This self-service mechanism allows heating to be implemented during driving operations without requiring separate heating systems.
3Temperature
If the motor is used for heating, then heating can be achieved, but noise increases and motor lifespan decreases
Solution Approach 1:
The invention extracts the heating function from the motor by creating a dedicated battery heating apparatus that operates independently through electrical discharge and charge loops. This separation prevents the motor from being overloaded with dual functions, thereby reducing noise, decreasing wear, and extending motor lifespan while maintaining effective battery heating capability.
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
Enables effective heating of traction batteries during discharge and charge cycles, maintaining vehicle operation in low temperatures without motor noise and extending motor lifespan by using an energy storage element to regulate voltage during charging.
Implementation Method 1
a heating module including a first leg, a second leg, and an energy storage element
Implementation Method 2
so as to heat the traction battery during discharge and charge
Data Source
AI summary
A battery heating apparatus configured to be connected to a traction battery and heat the traction battery. The battery heating apparatus includes a heating module including a first leg, a second leg, and an energy storage element, and a control module configured to control the first leg and the second leg to form a loop via which the traction battery discharges to the energy storage element and a loop via which the energy storage element charges the traction battery, so as to heat the traction battery during discharge and charge.