Battery pack and electric equipment
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Solution Overview
Problem
Battery packs in electric vehicles are prone to thermal runaway and explosion when subjected to thermal, electrical, or mechanical abuse, leading to chain reactions that result in the scrapping of the battery pack.
Innovation Solution
A battery pack design incorporating a battery module with alternately arranged liquid cooling plates and reinforcement beams, along with independently isolated cell groups, to enhance mechanical strength and prevent thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If battery cells are arranged closely to increase energy density, then the productivity and space utilization are improved, but the mechanical strength is reduced and thermal runaway risk increases
Solution Approach 1:
The battery pack is segmented into multiple independent cell groups separated by reinforcement beams and liquid cooling plates. This segmentation divides the battery system into isolated units that can withstand mechanical stress independently and prevent thermal runaway propagation, thereby maintaining high energy density while improving mechanical strength and safety.
2Productivity
If battery cells are arranged closely to increase energy density, then the space utilization is improved, but the reliability is reduced due to increased thermal runaway risk
Solution Approach 1:
The battery pack is divided into independent cell groups separated by reinforcement beams and liquid cooling plates, creating physical barriers that isolate thermal runaway events to individual groups while maintaining high overall energy density.
Solution Approach 2:
Liquid cooling plates are positioned between adjacent cell groups to act as thermal intermediaries. These plates actively manage heat transfer between groups, preventing thermal runaway propagation while allowing the battery pack to maintain high energy density through close cell arrangement.
3Strength
If reinforcement structures are added to improve mechanical strength, then the strength is improved, but the device complexity increases
Solution Approach 1:
The reinforcement beams serve multiple functions simultaneously: they provide mechanical strength to the battery pack structure, act as physical barriers to thermal runaway propagation, and serve as mounting structures for liquid cooling plates. This multi-functionality reduces overall device complexity while achieving improved mechanical strength.
Solution Approach 2:
The reinforcement structure is merged with the thermal management structure by integrating liquid cooling plates onto the reinforcement beams. This combination eliminates separate structural and thermal management systems, reducing device complexity while maintaining both mechanical strength and thermal safety.
4Reliability
If liquid cooling plates are added to prevent thermal runaway, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The liquid cooling plates serve dual functions: they actively cool battery cells to prevent thermal runaway and provide structural support as mounting surfaces for reinforcement beams. This multi-functionality improves thermal safety while minimizing the increase in device complexity.
Solution Approach 2:
The thermal management system is merged with the structural framework by positioning liquid cooling plates on reinforcement beams. This integration allows the structural elements to also serve thermal management purposes, reducing overall system complexity while improving reliability.
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 reinforces the battery pack's strength, prevents chain thermal runaway, and ensures independent isolation of each cell group, improving safety and reducing the risk of battery pack failure.
Implementation Method 1
The liquid cooling module includes a plurality of liquid cooling plates
Implementation Method 2
The reinforcement module includes a plurality of reinforcement beams
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present disclosure provides a battery pack (1) and an electric equipment. The battery pack (1) includes a battery module (20), a reinforcement module (12), and a liquid cooling module (30). The battery module (20) includes a plurality of cell groups (200) arranged at intervals along a first direction. Each cell group (200) includes a plurality of battery cells (21) arranged at intervals along a second direction. The reinforcement module (12) includes a plurality of reinforcement beams (121). The liquid cooling module (30) includes a plurality of liquid cooling plates (31). The plurality of liquid cooling plates (31) and the plurality of reinforcement beams (121) are alternately arranged along the first direction. One cell group (200) is provided between every adjacent two of the liquid cooling plates (31) and the reinforcement beams (121).