Battery Cell Terminal Post With Inclined Tab Connection
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Solution Overview
Problem
The existing battery designs with longer tab structures for connection and assembly with the battery terminal post occupy a larger space, reducing the energy density of the battery.
Innovation Solution
A battery cell design featuring a connecting hole in the terminal post with an inclined inner plane, where the tab is fixed and connected to this plane, minimizing space occupation and weight, thereby improving energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a longer tab structure is used for connection and assembly with the terminal post, then the connection reliability is improved, but the space occupied by the tab increases, reducing the energy density of the battery
Solution Approach 1:
The tab is nested within the terminal post by extending it into the connecting hole. The terminal post contains a cavity that accommodates the tab, allowing the tab to be housed inside the terminal post structure rather than extending externally. This nesting arrangement ensures reliable electrical connection while minimizing the space occupied by the tab, thereby improving battery energy density.
2Stability of the object's composition
If a longer tab structure is used for connection and assembly with the terminal post, then the connection stability is improved, but the weight of the tab and terminal post increases
Solution Approach 1:
The tab is nested within the terminal post structure, with the tab extending into the connecting hole and being housed inside the terminal post. This nesting configuration provides stable mechanical and electrical connection while minimizing the overall weight by eliminating redundant external tab length and reducing the terminal post size.
3Ease of manufacture
If the tab is extended longer for connection, then the ease of assembly is improved, but the energy density of the battery is reduced
Solution Approach 1:
The tab extends into the connecting hole of the terminal post and is nested within the terminal post structure. This arrangement maintains ease of assembly through a straightforward insertion and connection process while significantly reducing the space occupied by the tab, thereby improving battery energy density.
4Ease of manufacture
If the tab is connected to a flat surface of the terminal post, then the manufacturing simplicity is maintained, but the connection reliability and stability are reduced
Solution Approach 1:
The connecting hole of the terminal post is formed with an inclined surface rather than a flat surface. The inclined surface provides better mechanical engagement and contact area with the tab, enhancing connection reliability and stability. The curved or angled geometry of the connecting hole facilitates easier insertion and more secure positioning of the tab during assembly.
Data Source
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AI summary
Provided are a battery cell (10), a method for manufacturing a battery cell (10), a battery (100) and an electrical apparatus (1000) comprising same. The battery cell (10) comprises: a case (11) comprising a first wall (111); a terminal post (12) arranged on the first wall (111) and provided with a connecting hole (1223) passing through the terminal post (12), wherein at least part of the inner peripheral wall of the connecting hole (1223) is formed as a first inclined plane (12211), and the first inclined plane (12211) is obliquely arranged relative to the axis of the connecting hole (1223); and an electrode assembly (13) comprising an active material coating portion (131) and a tab (132), wherein the active material coating portion (131) is arranged in the case (11), the tab (132) is electrically connected to the active material coating portion (131), and at least part of the tab (132) extends into the connecting hole (1223) and is connected to the first inclined plane (12211).