Battery Heating Circuit Using Resonance Components for Charge Balancing
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Solution Overview
Problem
Batteries experience decreased capacity and increased resistance and polarization under low temperature conditions, affecting their charge/discharge performance in electric vehicles and electronic devices.
Innovation Solution
A battery heating circuit is designed with multiple charging/discharging circuits connected to batteries, utilizing damping components, current storage components, and switch units to control energy flow and balance electric quantities among batteries, allowing for simultaneous or separate heating and energy balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If batteries are used under low temperature conditions, then the operating range is extended, but the resistance increases and capacity decreases
Solution Approach 1:
The heating circuit is activated before the battery is put into operation at low temperatures. The control unit detects low temperature conditions and preemptively heats the battery through the heating circuit comprising inductors, capacitors, and resistors, ensuring the battery reaches optimal operating temperature before charge/discharge operations begin, thus preventing capacity loss.
Solution Approach 2:
The heating circuit changes the temperature parameter of the battery by converting electrical energy into thermal energy through resonant oscillation. The circuit adjusts electrical parameters (current, voltage, frequency) to generate appropriate heating effects, transforming the battery's thermal state from low temperature to optimal operating temperature range.
2Reliability
If heating circuit is added to improve low temperature performance, then charge/discharge performance improves, but device complexity increases
Solution Approach 1:
The heating circuit components (inductors L1-L4, capacitors C1-C4, resistors R1-R4) serve dual purposes: they form an oscillating circuit that generates heat for battery warming, while simultaneously functioning as energy storage and regulation elements. The switch units (Q1-Q4) and control unit enable the same circuit structure to perform both heating and charge/discharge operations, reducing overall system complexity.
Solution Approach 2:
The heating function is merged with the existing charge/discharge circuit structure. The oscillating circuit and heating elements are integrated into the battery management system, sharing common components like switch units, control units, and energy storage elements. This consolidation eliminates the need for separate heating circuitry, thereby reducing device complexity.
3Power
If multiple batteries are connected in series to increase voltage, then power output increases, but electric quantity imbalance occurs
Solution Approach 1:
The control unit continuously monitors the electric quantity (charge level) of each battery in the series connection. When imbalance is detected, the control unit adjusts the switching timing and duration of individual battery circuits through the switch units, redistributing energy flow to maintain electric quantity balance across all batteries, thus stabilizing the system composition.
Solution Approach 2:
The circuit configuration is made dynamic through the switch units (Q1-Q4) that can independently control current flow to each battery. This dynamic switching capability allows the system to adaptively adjust energy distribution among batteries in real-time, maintaining balance despite variations in individual battery characteristics or states of charge.
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 maintains battery capacity and improves low-temperature charge/discharge performance by generating heat and balancing electric quantities among batteries, ensuring optimal performance in harsh conditions.
Implementation Method 1
the resistance of the battery will increase... a first charging/discharging circuit, which is connected with the battery E1, and comprises a damping component R1
Implementation Method 2
comprises a damping component R1, a current storage component L1, a first switch unit (1) and a charge storage component C, all of which are connected in series to each other
Implementation Method 3
a damping component R1, a current storage component L1, a first switch unit (1) and a charge storage component C
Implementation Method 4
a first switch unit (1) and a charge storage component C, all of which are connected in series to each other
Data Source
AI summary
Certain embodiments of the present invention disclose a battery heating circuit, wherein: the battery comprises a battery E1 and a battery E2. For example, the heating circuit comprises: a first charging/discharging circuit, which is connected with the battery E1, and comprises a damping component R1, a current storage component L1, a first switch unit 1 and a charge storage component C, all of which are connected in series to each other; and a second charging/discharging circuit, which is connected to the battery E2, and comprises a damping component R2, a current storage component L2, a second switch unit 2 and the charge storage component C, all of which are connected in series with each other.