Vehicle Battery Arrangement With Switchable Series-Parallel Voltage Control
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Solution Overview
Problem
Current battery arrangements for motor vehicles, particularly electric and hybrid vehicles, are limited by fixed voltage levels and lack the necessary high-voltage changeover switches, making them inflexible and unsafe for various vehicle applications.
Innovation Solution
A battery arrangement with additional switches, such as high-voltage contactors, that allow for multiple operating states, including series and parallel connections, to manage voltage levels safely and efficiently, reducing the number of components and ensuring high-voltage safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed voltage level battery designs are used, then manufacturing simplicity is maintained, but adaptability to different vehicle applications is reduced
Solution Approach 1:
The battery arrangement employs switchable connections that allow dynamic reconfiguration between series and parallel configurations. The first and second electrical energy stores can be connected in series to achieve higher voltage (e.g., 800V) or in parallel to maintain lower voltage (e.g., 400V), enabling the same battery system to adapt to different vehicle applications without requiring multiple fixed-voltage battery designs.
2Power
If series connection for high voltage charging is implemented, then charging power is increased, but high-voltage safety requirements become more stringent
Solution Approach 1:
The patent introduces an electrical isolating device with multiple switches (first switch, second switch, third switch, fourth switch) that act as intermediaries to control and isolate high-voltage connections. These switches enable safe switching between series and parallel configurations, ensuring that high-voltage charging can be performed safely by properly isolating sections of the battery system when needed.
3Adaptability or versatility
If multiple switches and isolating devices are added, then voltage management flexibility is improved, but device complexity increases
Solution Approach 1:
The electrical isolating device and switch network are designed to perform multiple functions: enabling series connection for high-voltage charging, enabling parallel connection for lower-voltage operation, providing isolation for safety, and facilitating different charging configurations. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the overall increase in device complexity despite the added flexibility.
Data Source
Figure 1~3
AI summary
The object of the invention is to realize a battery arrangement (10) in accordance with the provisions for high-voltage safety. The invention relates to a battery arrangement (10) for a motor vehicle, having: - a first electrical energy store (12) and at least one second electrical energy store (14); - a charging connection (16) and a supply connection (22); - a first switch (36) by means of which a positive pole (28) of the first electrical energy store (12) can be connected to a positive pole (24) of the supply connection (22); - a third switch (40) by means of which a positive pole (32) of the second electrical energy store (14) can be connected to the positive pole (24) of the supply connection (22); - a fourth switch (42) by means of which a negative pole (34) of the second electrical energy store (14) can be connected to a negative pole (26) of the supply connection (22); and - a fifth switch (44) by means of which the positive pole (22) of the first electrical energy store (12) can be connected to the negative pole (34) of the second electrical energy store (14); wherein - the battery arrangement (10) has a second switch (38) by means of which a negative pole (30) of the first electrical energy store (12) can be connected to the negative pole (26) of the supply connection (22); - the battery arrangement (10) has a sixth switch (46) by means of which the negative pole (30) of the first electrical energy store (12) can be connected to the negative pole (20) of the charging connection (16); and - the battery arrangement (10) has a seventh switch (48) by means of which the positive pole (32) of the second electrical energy store (14) can be connected to the positive pole (18) of the charging connection (16).