Circuit Board Structure for Battery Heating
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Solution Overview
Problem
Existing battery heating configurations for vehicles, such as those used in emergency notification devices, require custom modules with integrated heating elements, which hinder the use of general-purpose batteries and increase costs due to the need for replacement, especially in low-temperature environments.
Innovation Solution
A circuit board structure with a detachably mounted battery and a heating element, where a heat transfer member conducts heat from the heating element to the battery, allowing for efficient heating without the need for custom modules and enabling easy battery replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a sheet heating element is wound around the battery to heat it, then the battery can be heated in low-temperature environments, but a custom module must be created by fixing and packing the heating element to the battery, which increases device complexity and replacement cost
Solution Approach 1:
The heating function is segmented from the battery itself and placed on the circuit board as a separate heating element. The heat transfer member acts as an intermediary component that connects the heating element to the battery, allowing the heating system to be modular and independent from the battery replacement cycle.
Solution Approach 2:
A heat transfer member is introduced as an intermediary component between the heating element and the battery. This mediator enables thermal coupling while maintaining physical separation, allowing the battery to be replaced without removing the heating element or creating a permanent integrated module.
2Temperature
If a sheet heating element is wound around the battery, then heating functionality is achieved, but the entire module including the heating element must be replaced when the battery is exhausted, increasing replacement cost
Solution Approach 1:
The heating system is segmented into independent components (heating element on circuit board, heat transfer member, battery) that can be replaced at different intervals. The battery can be replaced without affecting the heating element, reducing long-term costs.
Solution Approach 2:
The circuit board with heating element serves multiple functions: it provides power to the battery and simultaneously heats the battery when needed. The heating element remains on the universal circuit board that can be reused with different batteries over time.
3Device complexity
If the heating element and heat transfer member are disposed on the same surface of the circuit board, then the structure is simpler, but heat conduction efficiency is reduced
Solution Approach 1:
The heating element and heat transfer member are positioned on opposite surfaces of the circuit board, utilizing the third dimension (depth/thickness of the board) to achieve direct thermal coupling. Heat conducts through the thickness of the board via thermal via holes, improving efficiency without requiring the components to be adjacent on the same surface.
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
This configuration allows for efficient battery heating without additional cost and facilitates easy replacement, maintaining heat conduction efficiency while allowing for the use of general-purpose batteries, thus reducing overall costs and improving operational reliability in low-temperature conditions.
Implementation Method 1
a heating element thereon... heat generated by the heating element
Implementation Method 2
a heat transfer member that transfers heat generated by the heating element to the battery
Data Source
AI summary
A circuit board structure capable of heating a battery without requiring cost for adoption and replacement of the battery is provided. In the mounting of an auxiliary battery incorporated in an in-vehicle emergency notification device as a standby power supply for a main battery and a heater resistor for heating the auxiliary battery, a heat transfer mechanism for transferring heat generated by the heater resistor to the auxiliary battery is provided on a printed board. Further, the auxiliary battery is detachably fixed on the printed board through the heat transfer mechanism.