Battery Cell Bracket Venting for Reliable Bottom Valve Activation
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Solution Overview
Problem
Existing battery systems fail to maintain the integrity of the explosion-proof valve, which is not directly connected to the explosion-proof valve, which is not directly connected to the explosion-proof valve, which is not directly connected to the explosion-proof valve, which is not directly connected to the explosion-proof valve, which is not directly connected to the explosion-proof valve, which is not directly connected to the explosion-proof valve, which is not directly connected to the explosion-proof valve, which is not directly connected to the explosion-proof valve, which is not indirectly connected to the explosion-proof valve, which is indirectly connected to the explosion-proof valve, which is not indirectly connected to the explosion-proof valve, which is indirectly connected to the explosion-proof valve, which is indirectly connected to the explosion-proof valve, which is indirectly connected to the explosion-proof valve, which is not directly activated during thermal runaway, leading to safety hazards.
Innovation Solution
The battery cell design includes a first bracket with a first through hole and a second support portion, forming an accommodation space that houses the explosion-proof valve, preventing direct contact between the core and the valve, allowing gas to flow through the hole and accumulate, triggering the valve for pressure relief, and incorporating a second through hole for heat exchange with a liquid cooling plate, enhancing safety and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the core is directly connected to the bottom of the housing, then the structure is simple, but the explosion-proof valve is easily extruded or touched during assembly and use, causing failure
Solution Approach 1:
The patent introduces a bracket as an intermediary component between the core and the explosion-proof valve. The bracket includes a first supporting portion that supports the core and a second supporting portion that supports the explosion-proof valve, with a first through-hole connecting them. This intermediary structure prevents direct contact between the core and valve, avoiding extrusion and touching during assembly and use, thereby resolving the contradiction between structural simplicity and valve reliability.
2Device complexity
If the core is in direct contact with the explosion-proof valve, then the structure is simple, but when the core is subjected to thermal runaway, the explosion-proof valve cannot be normally activated, increasing safety hazard
Solution Approach 1:
The bracket serves as a mediator that isolates the core from the explosion-proof valve while maintaining functional connection through the first through-hole. During thermal runaway, gas generated from the core can pass through the first through-hole to activate the explosion-proof valve without the core directly contacting or interfering with the valve mechanism, ensuring normal activation and reducing safety hazards.
Solution Approach 2:
The patent segments the direct connection between the core and explosion-proof valve into separate functional zones: the core is supported on the first supporting portion, the valve on the second supporting portion, with the first through-hole providing controlled communication. This segmentation allows independent optimization of each component's function while maintaining system-level safety.
3Reliability
If the explosion-proof valve is disposed at the bottom of the housing, then the safety performance can be improved, but the valve is easily extruded or touched during assembly and use
Solution Approach 1:
The bracket acts as a protective intermediary that shields the explosion-proof valve from mechanical interference during assembly and use. The second supporting portion provides stable support for the valve, while the first through-hole maintains the necessary communication path. This intermediary structure preserves the safety benefits of bottom-mounted valves while eliminating the operational difficulties of valve extrusion or displacement.
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 design ensures the explosion-proof valve operates correctly during thermal runaway, reducing safety hazards and improving reliability by preventing direct contact and enabling efficient gas discharge and heat exchange, thus enhancing the safety and stability of the battery cell.
Implementation Method 1
the first through hole communicates with the accommodation space
Implementation Method 2
the second through hole is configured to communicate the accommodation space with the gap
Data Source
AI summary
Provided are a battery cell and a battery pack. The battery cell includes a core, a housing, an explosion-proof valve and a first bracket. The core is disposed in the housing, and the explosion-proof valve is disposed at a bottom of the housing. The first bracket is disposed in the housing, and the core is disposed on the first bracket. The first bracket is provided with a first through hole, the first bracket and the bottom of the housing are enclosed to form an accommodation space, the explosion-proof valve is located in the accommodation space, and the first through hole communicates with the accommodation space so that gas generated by the core may flow into the accommodation space via the first through hole.