Partitioned Electrode Assembly for High-Voltage Secondary Batteries
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Solution Overview
Problem
Existing secondary batteries face challenges in achieving high voltage levels without increasing size or requiring additional components like transformers, and they often suffer from power loss and heat generation due to internal resistance.
Innovation Solution
The secondary battery design includes a partition wall separating two electrode assembly parts, each with its own voltage, connected in series through insulated conductive plates, preventing ion exchange between them and allowing individual voltage management, thus achieving a higher overall voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple electrode assemblies are connected in series to achieve high voltage, then voltage capacity is improved, but device complexity and size increase
Solution Approach 1:
The patent combines multiple electrode assemblies (first electrode assembly part and second electrode assembly part) into a single integrated electrode assembly structure. The conductive plate with insulated conductive parts electrically connects both electrode assembly parts in series while maintaining a unified structure, thereby achieving high voltage without increasing device complexity or requiring separate battery units.
Solution Approach 2:
The electrode assembly is segmented into multiple independent parts (first electrode assembly part and second electrode assembly part) that can be separately manufactured and assembled. Each part has its own electrodes and separators, and they are connected through the conductive plate structure, allowing modular construction while maintaining overall simplicity.
2Power
If multiple electrode assemblies are connected in series to achieve high voltage, then voltage capacity is improved, but the battery size increases
Solution Approach 1:
The patent places the first electrode assembly part and second electrode assembly part in a nested or compact arrangement within the same case. The conductive plate structure allows both parts to be integrated in a space-efficient manner, with the insulating member enabling compact positioning of conductive components, thereby achieving high voltage without proportionally increasing battery volume.
3Device complexity
If conventional single electrode assembly design is used, then structure is simple, but voltage capacity is limited
Solution Approach 1:
The conductive plate serves multiple functions: it provides electrical connection between electrode assembly parts, acts as a structural support element, and works with the insulating member to enable series connection. This multi-functional design achieves high voltage capacity without proportionally increasing structural complexity.
4Power
If high current is used to compensate for low voltage, then power output is maintained, but power loss and heat generation increase
Solution Approach 1:
The patent changes the voltage parameter by connecting electrode assembly parts in series, which directly increases the operating voltage. According to the power formula P=UI, maintaining the same power output at higher voltage requires lower current, thereby reducing power loss (P_loss=I²R) and heat generation in the internal resistance.
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 voltage capacity, reduces power loss and heat generation, and eliminates the need for external transformers, while maintaining a compact size.
Implementation Method 1
a partition wall is between the first electrode assembly part and the second electrode assembly part... the movement of lithium ions may be blocked by the partition wall
Implementation Method 2
the first conductive plate comprises a first conductive part and a second conductive part that are insulated by an insulating member
Implementation Method 3
an electrode assembly includes a first electrode assembly part and a second electrode assembly part... the first conductive part is electrically connected to the first electrode assembly part, the second conductive part is electrically connected to the second electrode assembly part
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A secondary battery includes a case; and an electrode assembly and a conductive plate accommodated in the case, the electrode assembly includes a first electrode assembly part and a second electrode assembly part, a partition wall is between the first electrode assembly part and the second electrode assembly part, the conductive plate includes a first conductive plate on the electrode assembly and a second conductive plate under the electrode assembly, the first conductive plate includes a first conductive part and a second conductive part that are insulated by an insulating member, the first conductive part is electrically connected to the first electrode assembly part, the second conductive part is electrically connected to the second electrode assembly part, and the second conductive plate is electrically connected to the first electrode assembly part and the second electrode assembly part.