Battery Heating Circuit for Low-Temperature Self-Recovery
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Solution Overview
Problem
Existing battery management systems fail to maintain normal operation when temperatures drop below a certain level, leading to reduced lithium ion mobility and impaired charging/discharging capabilities, and they consume battery energy to heat the battery.
Innovation Solution
A battery management apparatus with a heating cell, switches, and a heating control unit that controls the operation of switches to heat the battery without a processing module, using energy from a separate heating cell to maintain temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a processing module is used to control heating when battery temperature drops below critical temperature, then the battery temperature can be maintained, but the system fails to operate when temperature is out of appropriate range and control unit cannot operate normally
Solution Approach 1:
The battery system performs self-heating through the heating element controlled by the first and second switches without requiring external control signals. When the battery temperature drops below the critical temperature, the low voltage directly causes the first switch to close and the second switch to open, automatically activating the heating element to warm the battery, thus the system serves itself without external intervention.
Solution Approach 2:
The patent replaces the electronic control system (processing module, control unit) with a direct electrical mechanism. Instead of using a control unit to sense temperature and activate heating, the system uses the battery's own voltage to directly control the switches through voltage thresholds, substituting electronic control with an electrical field-based mechanism that operates reliably even at low temperatures.
2Temperature
If battery energy is used to heat the battery, then the temperature can be maintained, but the battery energy is consumed
Solution Approach 1:
The patent introduces a heating element as an intermediary component between the battery and the heating function. The heating element converts electrical energy to thermal energy to warm the battery, while the battery's own voltage controls the switching mechanism. This intermediary allows the system to use the battery's voltage for control purposes while directing current through the heating element to generate heat, rather than consuming battery energy through control circuitry.
Solution Approach 2:
The battery system uses its own voltage to control the heating process without requiring external power sources. The low battery voltage automatically triggers the heating mechanism through the switch configuration, and the heating element converts electrical energy to thermal energy to warm the battery, making the system self-sufficient and avoiding additional energy consumption from external sources.
3Ease of operation
If the control unit operates at low temperature, then it can compare temperature and control switches, but the control unit may not operate normally when internal temperature is out of appropriate range
Solution Approach 1:
The patent extracts the temperature sensing and control decision-making function from the control unit and implements it through the inherent electrical characteristics of the battery voltage and switch configuration. Instead of relying on the control unit to sense temperature and make control decisions, the system uses the battery's voltage level to directly control the switches, removing the vulnerable control unit from the temperature control loop.
Solution Approach 2:
The patent replaces the electronic control unit's temperature sensing and decision-making mechanism with a direct electrical mechanism. The battery voltage directly controls the switch states through voltage thresholds, eliminating the need for the control unit to process temperature information. This substitution ensures reliable operation even when the control unit itself cannot function properly at low temperatures.
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 apparatus efficiently heats the battery to restore normal operation without consuming battery energy, ensuring continuous functionality even in low temperatures.
Implementation Method 1
a heating element connected to the heating cell in parallel and configured to increase a temperature of the battery by generating heat when a current is supplied from the heating cell
Data Source
AI summary
A battery management apparatus according to an embodiment of the present disclosure may manage a battery in consideration of mobility of lithium ions according to a temperature of the battery, and the present disclosure is directed to providing a battery management apparatus that may increase the temperature of a battery without control by a processing module when the temperature of the battery is lowered below a specific temperature. According to one aspect of the present disclosure, in an emergency situation when the temperature of the battery drops below a certain temperature, there is an advantage of allowing the battery to operate normally by heating the heating element to increase the temperature of the battery without going through a systemic process.