CTP Battery Pack Cooling Plate With Integrated Cell Support
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Solution Overview
Problem
The Cell to Pack (CTP) battery pack technology faces challenges with complex system design, high costs, difficulty in modularization, and low efficiency due to its module-less structure, which requires additional structural support and complicates the structure, leading to inefficiencies and rigidity issues.
Innovation Solution
A battery pack design incorporating a housing with pressure relief assemblies and liquid cooling plates that include support members to prevent deformation and cyclic expansion forces, forming a fixed structure that optimizes mechanical integration and simplifies the system, while using pressure relief pipes with weakened portions and trigger channels to manage thermal safety and cooling effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If additional structures are used to fix the cell group in module-less CTP battery pack, then the structural strength is improved, but the device complexity increases
Solution Approach 1:
The patent combines the support function and cooling function into a single integrated liquid cooling plate. The support members are embedded within the cooling plate structure, eliminating the need for separate support structures while providing both mechanical support and thermal management functions simultaneously.
Solution Approach 2:
The liquid cooling plate serves multiple functions: it provides cooling channels for thermal management, incorporates support members for structural support, and acts as a fixing structure for the cell group. This multi-functional design reduces the number of components needed in the module-less battery pack.
2Strength
If additional structures are used to fix the cell group in module-less CTP battery pack, then the structural strength is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines the support function and cooling function into a single integrated liquid cooling plate. The support members are embedded within the cooling plate structure, eliminating the need for separate support structures while providing both mechanical support and thermal management functions simultaneously.
3Device complexity
If the liquid cooling plate is used without support members, then the device complexity is reduced, but the liquid cooling plate deformation occurs under cyclic expansion forces
Solution Approach 1:
The support members are embedded within the liquid cooling plate structure. The cooling plate contains channels for coolant flow, and the support members are integrated into this structure, creating a nested configuration where the support function is housed within the cooling function structure.
4Reliability
If the pressure relief assembly is pressed against the cell group, then the upward channeling phenomenon is prevented, but the device complexity increases
Solution Approach 1:
The patent combines the pressure relief function and structural support function into an integrated fixing structure. The pressure relief assembly is pressed against the cell group through the support members of the cooling plate, merging multiple functions into a unified mechanical arrangement.
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 enhances the rigidity and efficiency of the battery pack, reduces production costs, simplifies the manufacturing process, and improves thermal safety pressure relief, preventing upward channeling and deformation issues, thereby addressing the structural and efficiency challenges of the CTP technology.
Implementation Method 1
a liquid cooling plate connected to the housing and abutting against second sides of the cell groups
Implementation Method 2
a pressure relief assembly connected to the housing and opposite to an explosion-proof valve of each of the cells
Data Source
AI summary
Disclosed is a battery pack according to the present disclosure. The battery pack includes a housing; a plurality of cell groups including a plurality of cells; a pressure relief assembly connected to the housing and pressing against first sides of the cell groups; and a liquid cooling plate provided with a support member located at a junction of two adjacent cell groups, and one side of the support member supports a second side of one of the two adjacent cell groups, another side of the support member supports a second side of another of the two adjacent cell groups.