Battery Self-Heating Circuit With Capacitor Noise Filtering
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Solution Overview
Problem
Existing battery self-heating technologies for vehicles increase noise interference during self-heating due to circulative charging and discharging, despite offering fast heating speed, high efficiency, and low costs.
Innovation Solution
A battery self-heating circuit comprising a first and second battery group, capacitors, and phase bridge arms and windings, where capacitors are connected in parallel with the battery groups to perform filtering and noise reduction during self-heating, and the circuit shares components with vehicle motors to save space and resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If battery self-heating technology uses circulative charging and discharging to generate heat through internal resistance, then heating speed and heating efficiency are improved, but noise interference increases
Solution Approach 1:
The patent introduces capacitors as intermediary components connected in parallel with the battery groups. These capacitors serve as mediators that filter out noise and interference generated during the circulative charging and discharging process, while allowing the heating function to continue uninterrupted. The capacitors absorb and smooth the electrical fluctuations that cause noise, thus resolving the contradiction between maintaining fast heating and reducing noise interference.
Solution Approach 2:
The patent extracts and separates the noise filtering function from the heating function by adding dedicated capacitor components. By taking out the noise interference aspect and addressing it separately through filtering components, the system can maintain the beneficial heating effect while removing the harmful noise generation, thus resolving the technical contradiction.
2Loss of energy
If battery self-heating technology uses circulative charging and discharging to generate heat through internal resistance, then heating efficiency is improved, but noise interference increases
Solution Approach 1:
Capacitors are introduced as intermediary components that filter noise while allowing the efficient heating process to continue. The capacitors smooth out electrical fluctuations during circulative charging and discharging, maintaining high heating efficiency while reducing the noise interference that would otherwise be generated by these rapid electrical transitions.
3Object-generated harmful factors
If multiple phase bridge arms and phase windings are added to the battery self-heating circuit, then noise reduction is improved, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by using capacitors that serve dual purposes: they filter noise interference and simultaneously stabilize the voltage during circulative charging and discharging. This universal approach allows noise reduction without requiring separate dedicated filtering components for each function, thereby reducing overall circuit complexity while achieving effective noise suppression.
Solution Approach 2:
The patent merges the noise filtering function with the existing battery circuit structure by integrating capacitors into the parallel connection configuration. By combining multiple functions (heating, noise filtering, voltage stabilization) into a unified circuit architecture, the system achieves noise reduction without proportionally increasing device complexity.
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 solution effectively reduces noise interference during self-heating while maintaining fast heating speed and efficiency, ensuring stable noise reduction and safe operation.
Implementation Method 1
capacitors are connected in parallel with the battery groups to perform filtering and noise reduction during self-heating
Implementation Method 2
The battery self-heating technology uses circulative charging and discharging of a battery, and relies on an internal resistance of the battery to generate heat
Data Source
AI summary
A battery self-heating circuit, includes a first battery group, a second battery group, a first capacitor, a second capacitor, multiple phases of bridge arms, and multiple phase of windings, which correspond to the multiple phases of bridge arms on a one-to-one basis.