Battery Connection System Temperature Detection Circuit

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Solution Overview

Problem

Existing battery charging systems cannot identify and adapt to new types of batteries beyond A-type and B-type, limiting their ability to perform appropriate temperature-related controls based on the battery's characteristics and internal temperature.

Innovation Solution

A battery-connection system that includes a temperature-detection circuit with a thermistor and resistance elements, allowing the connecting device to execute temperature-related controls without identifying the battery type, by adjusting the resistance value of the resistance elements based on the battery's characteristics and temperature, enabling flexible temperature control across different battery types.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the battery type is identified using a thermistor and voltage detection, then the charging control can be adapted to battery type, but the system cannot identify new types of batteries beyond A-type and B-type

Engineering Contradiction:

Improvebattery type identification capabilityVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent changes the detection parameter from voltage-based type identification to temperature-based universal control. By detecting battery temperature and adjusting charging parameters accordingly, the system can handle all battery types without requiring pre-programmed type identification, thus improving adaptability while maintaining simple system architecture

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent extracts the battery type identification function from the charging control system. Instead of identifying battery types to determine control parameters, the system directly uses temperature detection to adjust charging parameters, removing the need for complex type classification while maintaining appropriate control

Inventive Principle:

Principle #2Taking out (Extraction)

2Measurement precision

If the detected voltage is shifted by coupling the thermistor and resistor in series, then the battery type can be identified based on voltage level, but new types of batteries cannot be identified

Engineering Contradiction:

Improvebattery type classification accuracyVSAvoidcompatibility with new battery types

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

Instead of using voltage detection to identify battery type and then determining control parameters, the patent inverts the approach by using temperature detection to directly control charging parameters. This reversal eliminates the need for voltage-based type classification while achieving appropriate charging control for all battery types

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent introduces temperature as an intermediary parameter between battery characteristics and charging control. By detecting temperature and using it to adjust charging parameters, the system mediates between different battery types and the charging process, enabling universal compatibility without direct type identification

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the connecting device executes temperature-related control without identifying battery type, then the system can handle new battery types, but the control may not be optimized for specific battery characteristics

Engineering Contradiction:

Improvecompatibility with all battery typesVSAvoidcharging control accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements feedback control by continuously detecting battery temperature during charging and adjusting charging parameters in real-time. This feedback mechanism ensures reliable and optimized charging control for all battery types without requiring pre-programmed type-specific parameters, as the system adapts to each battery's actual thermal state

Inventive Principle:

Principle #23Feedback

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

Enables appropriate temperature-related control for individual batteries with different characteristics, regardless of their type, by adjusting the detection signal threshold values independently of the battery type, ensuring safe and efficient charging and discharging operations.

Implementation Method 1

The temperature-detection element is disposed at the specific location and possesses a resistance-temperature characteristic by which a resistance value of the temperature-detection element varies in accordance with the temperature of the specific location

Methodology Applied

Scientific EffectResistance-temperature characteristic: Thermistor

Data Source

PatentUS9941553B2Battery-connection system, battery pack, and method of forming temperature-detection circuit

Publication Date: 2018.04.10 MAKITA CORP

AI summary

A battery-connection system in one aspect of the present disclosure comprises a battery pack and a connecting device. The connecting device comprises a temperature-related control unit that is configured to execute a specific temperature-related control in accordance with a detection signal outputted from the battery pack when the battery pack is attached to the connecting device, without identifying a type of a battery in the battery pack.