Power Tool Battery Pack With Temperature-Based Power Limiting
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Solution Overview
Problem
Existing battery packs for power tools face safety concerns and reduced service life due to prolonged high-temperature operations, which can lead to hazardous conditions and decreased performance.
Innovation Solution
A battery pack design featuring a housing assembly with multiple cells, a first interface for connecting to a charging device, a second interface (such as Type-C) for powering tools, and a power control module that adjusts charge/discharge power based on the battery pack's temperature, using temperature detection units and management/adjustment modules to control voltage and current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the battery pack operates at high temperature for prolonged periods to maintain power output, then the power delivery capability is improved, but the safety and service life of the battery pack deteriorate
Solution Approach 1:
The patent implements a temperature feedback control mechanism where temperature detection units continuously monitor the battery pack temperature and feed this information to the power control module. The power control module adjusts the charge/discharge power based on the detected temperature, creating a closed-loop feedback system that prevents overheating while maintaining optimal power output within safe temperature ranges.
Solution Approach 2:
The patent dynamically changes the operating parameters (charge/discharge power) of the battery pack based on temperature conditions. The power control module adjusts power levels according to detected temperature values, modifying the electrical parameters to prevent thermal runaway and extend battery life while still delivering adequate power when needed.
2Productivity
If the battery pack allows high charge/discharge power to meet power demands, then the productivity is improved, but the temperature control and safety deteriorate
Solution Approach 1:
The patent employs dynamic power adjustment where the charge/discharge power is not fixed but varies continuously based on real-time temperature detection. The power control module dynamically modifies power levels to balance productivity requirements with thermal management, allowing high power when temperatures are safe and reducing power when temperature thresholds are approached.
Solution Approach 2:
The temperature detection units provide continuous feedback to the power control module, enabling real-time adjustments to charge/discharge power. This feedback mechanism ensures that productivity is maximized within safe thermal boundaries, automatically reducing power when temperature rises and allowing higher power when conditions permit.
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 reduces the risk of high-temperature hazards, enhances the safety and longevity of the battery pack, and optimizes power management to ensure efficient charging and discharging operations.
Implementation Method 1
the temperature detection unit includes a first temperature detection unit and/or a second temperature detection unit, where the first temperature detection unit is used for detecting the temperature of the power control module in the battery pack, and the second temperature detection unit is used for detecting the temperature of the multiple cells in the battery pack
Implementation Method 2
The power control module is used for changing the charge power and/or discharge power of the second interface according to the temperature of the battery pack
Implementation Method 3
the adjustment unit includes a voltage control module used for, when the temperature of the battery pack is greater than or equal to the preset threshold, reducing the voltage reaching the second interface
Implementation Method 4
the adjustment unit includes a current control module used for, when the temperature of the battery pack is greater than or equal to the preset threshold, reducing the current reaching the second interface
Data Source
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AI summary
Provided is a battery pack configured to be capable of supplying power to a power tool. The battery pack includes a housing assembly; multiple cells disposed in the housing assembly; a first interface configured to be connectable to a first charging device and configured to be capable of supplying power to the power tool; a second interface configured to be connectable to a second charging device; and a power control module configured to be connected to the second interface. The power control module is used for changing the charge power and/or discharge power of the second interface according to the temperature of the battery pack. The preceding technical solution is adopted so that a safer battery pack with a longer service life for a power tool can be provided.