Battery Pack Temperature Sensor Fixing via Lead Plate Hole
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Solution Overview
Problem
Existing battery packs face challenges in preventing damage to temperature sensors and ensuring their reliability, particularly in monitoring temperature information to prevent overheating and accidents such as explosions in portable computers.
Innovation Solution
A battery pack design that includes a lead plate with a hole for fixing a temperature sensor, a protection circuit module connected to the lead plate, and a temperature sensor connected through a flexible cable, where the lead plate has conductive plates and an insulation film to prevent short-circuits, and a bypass portion to reduce leakage current, along with a temperature protection device to control charge and discharge based on temperature measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the temperature sensor is directly placed on the battery cell without a fixing structure, then the temperature monitoring is simple, but the temperature sensor is easily damaged and its reliability is reduced
Solution Approach 1:
The lead plate with a through-hole serves as an intermediary structure that fixes the temperature sensor in place. The hole allows the sensor to be positioned and secured against the battery cell while the lead plate provides mechanical support and protection, preventing direct damage to the sensor and improving its reliability without requiring additional complex fixing mechanisms.
2Reliability
If the lead plate uses only conductive plates for electrical connection, then the electrical connection is simple, but leakage current occurs between adjacent battery cells
Solution Approach 1:
The lead plate is segmented into multiple conductive plates that are electrically isolated from each other by insulation films. Each conductive plate connects to a specific battery cell terminal, and the insulation films prevent electrical leakage between adjacent conductive plates, thereby eliminating leakage current while maintaining reliable electrical connections.
Solution Approach 2:
Insulation films are introduced as intermediary layers between adjacent conductive plates on the lead plate. These films act as electrical barriers that prevent leakage current while allowing the conductive plates to maintain their electrical connections to the battery cells, thus reducing energy loss without compromising connection reliability.
3Reliability
If the temperature sensor is connected through a rigid cable, then the electrical connection is stable, but the battery pack structure becomes less flexible and more complex
Solution Approach 1:
A flexible cable is used to connect the temperature sensor to the protection circuit module instead of a rigid cable. The flexible cable maintains electrical connection stability while allowing easier routing and integration within the battery pack structure, reducing the overall complexity of cable management and improving the flexibility of the battery pack design.
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 design effectively prevents damage to the temperature sensor, enhances its reliability, and allows for timely detection of abnormal temperature changes, thereby preventing accidents like ignition or explosion, while maintaining a compact and efficient battery pack structure.
Implementation Method 1
a temperature sensor electrically connected with the protection circuit module to measure the temperature of the plurality of battery cells
Data Source
AI summary
The present invention relates to a battery pack. The battery pack includes a plurality of battery cells arranged side-by-side, a lead plate electrically connecting the plurality of battery cells, a protection circuit module electrically connected with the plurality of battery cells, and a temperature sensor electrically connected with the protection circuit module to measure a temperature of the plurality of battery cells, wherein the lead plate has hole into which the temperature sensor is inserted, for fixing the position of the temperature sensor. By the above construction, the installation position of the temperature sensor is specified, so that the temperature sensor may be prevented from being damaged and the reliability of the temperature sensor may be enhanced.