Battery Core Assembly With Intermediate Ring for Stable Lead-Outs
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Solution Overview
Problem
The wobbling of positive and negative terminals in battery cores affects the connection between multiple electrically connected battery cores, leading to disconnection issues and reduced service life in power batteries used in new energy vehicles.
Innovation Solution
A battery core assembly design featuring an encapsulation film with an intermediate ring and electrode lead-out members, where the intermediate ring includes a lead-out hole and first liquid reservoirs to stabilize the electrode lead-out members, and an electrolyte solution is injected to enhance stability and store electrolyte, reducing lithium plating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple battery cores are electrically connected to enhance capacity, then the battery capacity is improved, but the terminals tend to wobble and disconnect
Solution Approach 1:
The patent introduces an intermediate ring as a mediator component between the battery core and the lead-out member. This intermediate ring provides a stable connection interface that prevents terminal wobble and disconnection, thereby maintaining connection reliability while enabling multiple battery cores to be electrically connected for enhanced capacity.
Solution Approach 2:
The patent divides the lead-out structure into segmented components: the battery core, the intermediate ring, and the lead-out member. This segmentation allows each component to perform its specific function optimally, with the intermediate ring specifically designed to stabilize the connection and prevent wobble, thus resolving the contradiction between capacity enhancement and connection stability.
2Reliability
If the intermediate ring and encapsulation film are hermetically connected, then sealing is improved, but electrolyte solution cannot be replenished
Solution Approach 1:
The patent employs a dynamic sealing approach where the intermediate ring is initially hermetically connected to the encapsulation film to ensure sealing performance, but includes a breakable seal structure that can be dynamically opened. This allows the system to transition from a sealed state during normal operation to an open state for electrolyte replenishment when needed, resolving the contradiction between sealing and replenishment capability.
Solution Approach 2:
The patent incorporates a preliminary designed breakable seal structure between the intermediate ring and encapsulation film. This pre-configured feature allows for controlled breaking to enable electrolyte replenishment, while maintaining hermetic sealing during normal operation. The breakable seal is positioned and designed to break only when necessary for maintenance or electrolyte top-up.
3Quantity of substance
If first liquid reservoirs are added to the intermediate ring, then electrolyte storage is improved, but device complexity increases
Solution Approach 1:
The patent designs the intermediate ring to serve multiple functions simultaneously: it acts as a connection stabilizer to prevent terminal wobble, provides a platform for electrolyte storage through integrated liquid reservoirs, and maintains the electrical connection between battery cores. By making the intermediate ring multi-functional, the patent increases electrolyte storage capacity without proportionally increasing overall device complexity, as the intermediate ring itself is already a necessary component for connection stability.
Data Source
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AI summary
The present disclosure provides a battery core assembly (10), a battery (100), a battery pack (200), and a vehicle (300). The battery core assembly (10) includes an encapsulation film (11) and an electrode core assembly (12). The electrode core assembly is arranged in an accommodating cavity (110) defined by the encapsulation film, and the electrode core assembly (12) includes at least one electrode core (121). The electrode core assembly is provided with two electrode lead-out members (122) of opposite polarities for current output. An intermediate ring (13) is further arranged in the accommodating cavity (110) at a side of the electrode core assembly (12) provided with the electrode lead-out member, and provided with an electrode lead-out hole (131) for leading the electrode lead-out member out. Moreover, the present disclosure further provides a battery (100), a battery pack (200), and a vehicle (300) based on the battery core assembly provided in the present disclosure.