Prismatic Cell Battery Pack With Shared Electrolyte Cooling
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Solution Overview
Problem
Existing battery packs face issues of inconsistent electrolyte distribution leading to uneven heat generation among cells, resulting in safety hazards and increased volume, complexity, and cost due to liquid cooling systems.
Innovation Solution
A battery pack design featuring prismatic cells connected in parallel with a shared electrolyte system, a fixing assembly, and a heat exchange assembly that ensures uniform electrolyte distribution and balanced heat dissipation, using a heat exchange assembly connected to electrode terminals for efficient heat management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a liquid cooling circulating pipeline is provided to dissipate heat from the battery pack, then the heat dissipation effect is improved, but the battery pack volume increases, production and assembly become complex, numerous supporting devices are required, and cost increases
Solution Approach 1:
The patent combines the electrolyte circulation system with the heat dissipation function. The shared pipeline assembly that distributes electrolyte to all prismatic cells also serves as the cooling system, eliminating the need for separate liquid cooling pipelines and reducing structural complexity
Solution Approach 2:
The electrolyte in the shared pipeline assembly performs multiple functions: it serves as both the chemical medium for battery operation and the cooling medium for heat dissipation. This multi-functional design replaces the dedicated liquid cooling system, reducing the number of components and simplifying production
2Temperature
If the flow path or flow area of liquid cooling medium is increased to ensure heat dissipation effect, then the heat dissipation effect is improved, but the battery pack volume increases
Solution Approach 1:
The cooling function is merged into the existing electrolyte circulation paths within the prismatic cells. The shared pipeline assembly utilizes the internal space of the battery cells for both electrolyte storage and heat dissipation, eliminating the need for additional external cooling channels that would increase volume
3Reliability
If battery cells have inconsistent heat generation, then safety hazards occur, but increasing cooling capacity increases system complexity and cost
Solution Approach 1:
The shared pipeline assembly enables individualized electrolyte circulation for eachprismatic cell, allowing localized heat management. Each cell receives electrolyte through dedicated channels from the shared pipeline, enabling targeted cooling where heat generation is highest without requiring a complex overall cooling system
Solution Approach 2:
The system enables monitoring of individual cell temperatures through the electrolyte circulation system. Temperature sensors can detect heat generation variations in real-time, and the electrolyte flow can be adjusted to provide active cooling to specific cells with inconsistent heat generation, preventing safety hazards
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 solution achieves balanced heat generation, reduces safety risks, and simplifies production and assembly while lowering costs by ensuring uniform electrolyte distribution and efficient heat dissipation.
Implementation Method 1
The shared pipeline assembly is configured to communicate all inner cavities of the plurality ofprismatic cells, so that all theprismatic cells of the plurality ofprismatic cells in the battery pack are in one electrolyte system
Implementation Method 2
The heat exchange assembly is configured to be fixedly connected to electrode terminals on the same sides of the plurality ofprismatic cells, to achieve heat exchange between all theprismatic cells of the plurality ofprismatic cells in the battery pack and the outside
Data Source
Figure 1~2
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Figure 5a~6
AI summary
Disclosed in an embodiment are a battery pack and an energy storage device. The battery pack comprises a fixing assembly, a shared pipeline assembly, a heat exchange assembly, and a plurality of prismatic cells. The plurality of prismatic cells are connected in parallel. The fixing assembly is configured to fixedly connect the plurality of prismatic cells side by side to form the battery pack. The shared pipeline assembly is configured to communicate all inner cavities of the plurality of prismatic cells, so that all the prismatic cells in the battery pack are in one electrolyte system. The heat exchange assembly is configured to be fixedly connected to electrode terminals on the same sides of the plurality of prismatic cells, to achieve heat exchange between all the prismatic cells in the battery pack and the outside. This application can enhance uniformity of electrolytes in the prismatic cells in the battery pack, prolong a cycle life, replenish an electrolyte for the battery pack through the shared pipeline assembly, prolong the service life of the battery pack, and also improve safety in use of the battery pack.