Battery Pack Waterproof Adhesive Structure for Coolant Leak Prevention
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Solution Overview
Problem
Existing battery packs face complications in the waterproofing process due to the need for individual press-fitting of battery cells, which increases the risk of leakage and complicates assembly, necessitating a simpler and more reliable waterproof structure.
Innovation Solution
A battery pack design incorporating a battery cell assembly with a coolant-filled structure, a pack case, and a waterproof adhesive that simplifies assembly by adhesive bonding, reducing the risk of leakage and enhancing waterproof reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery cells are individually press-fitted into the pack frame to achieve waterproofing, then waterproofing is provided, but the work process becomes complicated and leakage risk increases
Solution Approach 1:
The patent merges multiple battery cells into a battery cell assembly that is treated as a single unit for waterproofing purposes. The waterproof adhesive seals the entire assembly at once rather than requiring individual sealing of each cell, thereby reducing process complexity while maintaining waterproof reliability.
Solution Approach 2:
The waterproof adhesive serves multiple functions: it seals the battery cell assembly against moisture, provides structural support, and simplifies the assembly process. This multi-functional approach reduces the need for separate sealing operations for each cell.
2Reliability
If battery cells are individually press-fitted into the pack frame, then waterproofing is achieved, but manufacturing efficiency decreases
Solution Approach 1:
By combining multiple battery cells into a single assembly unit for waterproofing, the patent reduces the number of repetitive sealing operations required. This merging approach significantly improves manufacturing efficiency while maintaining the same level of waterproof reliability.
Solution Approach 2:
The battery cell assembly is prepared and pre-sealed as a complete unit before installation into the pack frame. This preliminary action eliminates the need for individual cell sealing operations during final assembly, thereby improving manufacturing efficiency.
3Reliability
If battery cells are individually press-fitted into the pack frame, then waterproofing is provided, but the risk of leakage increases
Solution Approach 1:
The patent reduces the number of sealing interfaces by treating the battery cell assembly as a single unit. Fewer individual sealing operations mean fewer potential failure points, thereby reducing leakage risk while maintaining waterproof reliability.
4Productivity
If a waterproof structure is implemented to simplify the waterproofing process, then manufacturing efficiency improves, but waterproof reliability may be compromised
Solution Approach 1:
The patent successfully merges multiple battery cells into a single sealable assembly, achieving both simplified waterproofing process (improved manufacturing efficiency) and maintained waterproof reliability through the use of waterproof adhesive on the complete assembly.
Solution Approach 2:
The patent changes the approach from individual cell sealing to assembly-level sealing, fundamentally altering the waterproofing parameter from micro-scale (individual cell) to macro-scale (complete assembly), thereby improving efficiency without compromising 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 simplifies the waterproofing process, improves assembly efficiency, reduces leakage risks, and enhances safety by preventing the spread of heat, gas, or flame during abnormal conditions, thereby ensuring the integrity and reliability of the battery pack.
Implementation Method 1
a waterproof adhesive provided in the pack case to a certain height and at least partially covering a lower end portion of the battery cell assembly
Implementation Method 2
a coolant filled between the plurality of battery cells of the battery cell assembly
Data Source
AI summary
A battery pack according to an embodiment of the present disclosure includes a battery cell assembly including a plurality of battery cells, a coolant filled between the plurality of battery cells of the battery cell assembly, a pack case in which the coolant and the battery cell assembly are accommodated, and a waterproof adhesive provided in the pack case to a certain height and at least partially covering a lower end portion of the battery cell assembly.