Battery Module Temperature Plugging Structure for Accurate Internal Sensing
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Solution Overview
Problem
Conventional battery modules inaccurately measure internal battery temperatures due to a significant temperature difference between the connection strap and the battery, leading to premature power limitation, which affects performance and efficiency.
Innovation Solution
A battery module design that includes a plugging member with an insertion portion and a temperature collection assembly, where the temperature collection portion is placed inside the battery housing, allowing for accurate temperature reflection and timely response, reducing the risk of premature power limitation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature is collected through a thermistor on the circuit board measuring connection strap temperature, then temperature collection is simple, but the measured temperature is higher than actual battery temperature causing premature power limitation
Solution Approach 1:
The patent introduces a plugging member as an intermediary component that bridges the temperature collection hole and the battery interior. This plugging member contains an accommodating cavity that houses the temperature collection assembly, allowing the thermistor to measure temperature at the battery's actual location rather than on the connection strap, thereby eliminating the temperature differential error while maintaining structural simplicity
Solution Approach 2:
The patent transitions from surface temperature measurement (on the connection strap) to internal temperature measurement (within the battery) by creating a temperature collection hole through the cover plate and using a plugging member to extend the measurement capability into the third dimension - the interior space of the battery housing
2Reliability
If power limitation is applied to protect battery safety, then battery safety is improved, but vehicle performance and acceleration are reduced due to premature limitation
Solution Approach 1:
The patent implements accurate temperature feedback by positioning the temperature collection assembly within the battery interior through the plugging member. This provides real-time, accurate temperature data to the control system, enabling precise determination of when actual power limitation is necessary versus when performance can be maintained, thus avoiding premature power limitation while ensuring safety
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 design ensures accurate temperature collection and timely response, optimizing battery module efficiency and vehicle performance by reducing premature power limitations and enhancing reliability.
Implementation Method 1
a temperature collection assembly, including a temperature collection portion, where the temperature collection portion is installed inside the accommodating cavity
Data Source
AI summary
This application relates to the battery field, and discloses a battery module and an electric vehicle using the battery module. The battery module includes a battery, a plugging member, and a temperature collection assembly. The battery includes a housing and a cover plate connected to the housing, where the cover plate is provided with a temperature collection hole. The plugging member includes an insertion portion that is installed in the temperature collection hole, and the insertion portion is provided with an accommodating cavity extending into an interior of the housing. The temperature collection assembly includes a temperature collection portion installed inside the accommodating cavity. According to this application, the temperature collection assembly collects a temperature inside the housing via the plugging member in the temperature collection hole. In this way, temperature collection is more accurate, a thermal conductive path is short, and a temperature collection response speed is fast.