Battery module having improved waterproof and antivibration performance and battery pack including the same
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Solution Overview
Problem
Conventional battery modules with IP63 water resistance ratings are limited in application due to the need for a sealing gasket, which complicates assembly and increases manufacturing tolerance issues, while lacking effective anti-vibration performance.
Innovation Solution
A battery module design featuring a lower and upper case with strategically angled ribs for one face contact and multiple line contacts, eliminating the need for a sealing gasket and allowing for easy assembly despite manufacturing tolerances, while providing enhanced waterproof and anti-vibration capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing gasket is provided at the region where upper case and lower case are brought into tight contact, then IP53 rating (waterproof performance) is achieved, but device complexity increases and manufacturing precision requirements increase
Solution Approach 1:
The invention extracts and eliminates the sealing gasket component from the battery module structure. By designing the upper and lower cases with integrated rib structures that form tight contact interfaces directly, the patent removes the need for separate sealing components, thereby reducing structural complexity while maintaining IP53 waterproof rating
Solution Approach 2:
The invention merges the sealing function into the case structure itself through the rib design. The upper rib and lower rib structures are integrated directly into the upper and lower cases, combining the structural support function with the sealing function, eliminating the need for separate gasket components
2Reliability
If a sealing gasket is provided at the region where upper case and lower case are brought into tight contact, then IP53 rating (waterproof performance) is achieved, but manufacturing precision requirements increase due to accurate receiving portion formation
Solution Approach 1:
The invention extracts the separate receiving portion for gasket installation and replaces it with a direct rib-to-rib tight contact interface. This eliminates the need for precisely formed receiving portions, reducing manufacturing precision requirements while achieving the same waterproof sealing effect
Solution Approach 2:
The rib structures are designed to self-align and self-seal through their geometric configuration. The upper rib and lower rib automatically form a tight contact interface when the cases are assembled, eliminating the need for precisely pre-formed receiving portions and complex gasket installation procedures
3Reliability
If conventional battery module structure is used with IP63 rating, then basic protection is provided, but application scope is limited and anti-vibration performance is insufficient
Solution Approach 1:
The invention changes the structural parameters of the case interface by designing specific rib geometries with predetermined angles and dimensions. This optimization of structural parameters enhances both the waterproof sealing capability and the anti-vibration performance, enabling broader application scope beyond basic protection requirements
4Reliability
If upper rib and lower rib are brought into tight contact through multiple surfaces, then waterproof and anti-vibration performance are enhanced, but assembly complexity increases
Solution Approach 1:
The invention segments the contact interface into distinct functional surfaces: a first contact surface for primary sealing, a second contact surface for enhanced sealing, and a third contact surface for anti-vibration support. This segmentation allows each surface to be optimized for its specific function while maintaining relatively simple assembly through the predetermined geometric configuration
Data Source
AI summary
A battery module has improved waterproof and anti-vibration performance and a battery pack including the same. The battery module may be configured such that a battery cell is received in a space defined by a lower case and an upper case. A lower rib at a tip end of the lower case and an upper rib at a tip end of the upper case are brought into contact with each other, and the contact includes one face contact and one or more line contacts.