Parallel Battery Heating Circuit Using Series Resonance Components
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Solution Overview
Problem
Batteries experience reduced capacity and performance under low temperature conditions due to increased resistance and polarization, which affects the service life and charge/discharge efficiency.
Innovation Solution
A battery heating circuit is designed with a first and second battery, switch units, damping components, current storage components, and an energy storage component, where the switching control module alternately switches the electric energy flow between the batteries and energy storage component to generate heat through damping components, improving heating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If batteries operate under low temperature conditions, then the battery resistance increases and polarization increases, but the battery capacity is reduced and charge/discharge performance deteriorates
Solution Approach 1:
The patent employs periodic switching of switch units to alternately connect different battery groups to the energy storage component, creating a cyclic charging/discharging process that generates continuous heat through the damping components, thereby maintaining battery temperature within the optimal range for charge/discharge operations
Solution Approach 2:
The heating circuit utilizes the battery groups themselves as the heat source through their internal resistance and the damping components, eliminating the need for external heating devices. The batteries heat each other alternately through the energy storage component, achieving self-heating that improves charge/discharge performance under low temperature conditions
2Temperature
If conventional heating methods are used to heat batteries under low temperature conditions, then the battery temperature increases, but the heating efficiency is low and energy consumption is high
Solution Approach 1:
The system uses the batteries' own electrical energy to generate heat through the damping components during the charging/discharging cycles, eliminating the need for external power sources for heating. This self-heating mechanism significantly improves heating efficiency and reduces overall energy consumption
Solution Approach 2:
The patent converts the harmful effect of battery resistance (which causes energy loss) into a beneficial heating effect. By utilizing the damping components and energy storage component to create controlled current flow, the resistance that would normally waste energy is instead harnessed to heat the batteries efficiently
3Loss of energy
If switch units are controlled to switch on alternately to make electric energy flow between batteries and energy storage component, then heating efficiency is improved, but the circuit complexity increases
Solution Approach 1:
The patent divides the battery system into multiple independently controllable groups (first battery group, second battery group, third battery group), each connected to the energy storage component through separate switch units. This segmentation allows for simplified control of individual groups while achieving overall system heating through alternating operation
Solution Approach 2:
The patent combines multiple battery groups and switch units into a unified heating circuit that shares common energy storage and damping components. This merging approach allows the system to achieve improved heating efficiency through coordinated operation while avoiding the need for completely separate heating circuits for each battery group
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 circuit effectively heats the batteries, enhancing their low-temperature charge/discharge performance and maintaining battery capacity by ensuring continuous current flow through damping components, thus improving heating efficiency and protecting the batteries.
Implementation Method 1
causes the damping component R1 and the damping component R2 to generate heat, so as to heat up the first battery and the second battery
Implementation Method 2
when the energy storage component V1 is charged or discharges, the direction of charging/discharging current in the second charging/discharging circuit is opposite to the direction of charging/discharging current in the first charging/discharging circuit
Data Source
AI summary
Certain embodiments of the present invention provide a battery heating circuit, wherein: the battery comprises a first battery and a second battery; the heating circuit comprises a first switch unit, a second switch unit, a damping component R1, a damping component R2, a current storage component L3, a current storage component L4, a switching control module and an energy storage component V1; the first battery, the damping component R1, the current storage component L3, the energy storage component V1 and the first switch unit are connected in series to constitute a first charging/discharging circuit; the second battery, the damping component R2, the current storage component L4, the energy storage component V1 and the second switch unit are connected in series to constitute a second charging/discharging circuit.