Battery Pack Spatial Arrangement for Interference Reduction
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Solution Overview
Problem
Existing battery packs for electrically driven gardening and forestry tools are susceptible to electrical and electromagnetic interference, and they often require complex cable management, which can lead to space inefficiencies and increased costs due to the need for shielding and precise assembly.
Innovation Solution
A battery pack design featuring a cell block with accumulator cells arranged in series and an electronics unit with a measurement electronics part positioned to minimize electromagnetic interference, allowing for a space-saving and interference-resistant configuration without the need for shielding, using a specific spatial arrangement of power lines and electronics components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional battery pack designs are used with complex cable management, then electromagnetic interference is reduced through shielding, but device complexity and cost increase
Solution Approach 1:
The patent extracts the measurement electronics from the high-interference zone by positioning it on the first cell block side away from the second end where high current flows. This spatial separation removes the sensitive electronics from the harmful electromagnetic environment without requiring shielding, thereby reducing device complexity while maintaining interference resistance.
Solution Approach 2:
The patent introduces an intermediary spatial arrangement where the first electrical power line traverses through the cell block from one side to the other, creating a physical pathway that separates the measurement electronics from the high-current regions. This intermediary configuration acts as a spatial mediator that reduces electromagnetic coupling without adding shielding complexity.
2Measurement precision
If shielding is added to protect against electromagnetic interference, then measurement precision is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The measurement electronics are extracted from the high-interference zone by positioning them on the first cell block side at a distance from the second end. This spatial extraction ensures measurement precision is maintained through physical separation from electromagnetic sources, eliminating the need for expensive shielding materials and complex manufacturing processes.
3Volume of moving object
If space-saving design is implemented without shielding, then device volume is reduced, but susceptibility to electromagnetic interference increases
Solution Approach 1:
The patent resolves the space-interference contradiction by utilizing the third dimension (depth within the cell block) for spatial separation. The measurement electronics are positioned on the first cell block side while the first electrical power line traverses through the cell block, creating vertical and lateral separation without increasing external dimensions. This dimensional arrangement reduces electromagnetic susceptibility while maintaining compact volume.
Solution Approach 2:
The measurement electronics are extracted from the high-current region at the second end and positioned at the first end, creating spatial separation that reduces electromagnetic susceptibility. This extraction allows for compact design without shielding because the sensitive electronics are physically removed from the interference zone.
4Volume of moving object
If measurement electronics are positioned close to high current paths, then space is saved, but electromagnetic interference increases
Solution Approach 1:
The patent uses spatial arrangement in multiple dimensions within the cell block structure. The measurement electronics are positioned on the first cell block side while the first electrical power line runs from the first side through the cell block to the second side, creating lateral and depth-based separation. This dimensional arrangement achieves both spatial efficiency and interference reduction without compromising either.
Solution Approach 2:
The measurement electronics are extracted from the high-current zone at the second end and relocated to the first cell block end, creating physical separation that reduces electromagnetic interference. This extraction maintains spatial efficiency because the electronics are positioned at the opposite end rather than requiring additional space elsewhere in the battery pack.
Data Source
Figure 1~2
Figure 3~4a
Figure 4b~6
AI summary
The invention relates to a battery pack (1) for supplying an electrically driven garden and/or forestry tool (101) with electrical drive power (AL), wherein the battery pack (1) comprises: - a cell block (2a), wherein the cell block (2a) comprises a plurality of accumulator cells (4a), wherein at least a portion of the accumulator cells (4a) are spatially arranged successively and electrically connected in series from a first cell block end (2aE1) of the cell block (2a) in at least a first direction (x) to a second cell block end (2aE2) of the cell block (2a), and - an electronic unit (3), wherein the electronic unit (3) comprises a measuring electronics part (5). Additionally, one of the accumulator cells (4a) at the first cell block end (2aE1) is at ground potential (MP), and the measuring electronics part (5) is spatially arranged in the region of the first cell block end (2aE1).Additionally or alternatively, the battery pack (1) has a first electrical power line (6a1) and a second electrical power line (6a2), - wherein the second electrical power line (6a2) is electrically connected to one of the accumulator cells (4a) at the second cell block end (2aE2), - wherein the first electrical power line (6a1) at the second cell block end (2aE2) extends from a first cell block side (2aS1) of the cell block (2a) in a second direction (y) not parallel to the first, to one of the first opposite, second cell block sides (2aS2) of the cell block (2a) and on the second cell block side (2aS2) in the opposite direction (x) to the first cell block end (2aE1) and is electrically connected to one of the accumulator cells (4a) at the first cell block end (2aE1), and - wherein the measuring electronics part (5) extends from the second cell block end (2aE2) on the first cell block side (2aS1) in the opposite direction (x) to the first cell block end (2aE2). is spatially spaced apart in the first direction (x).