Centralized High-Voltage Switch Box for Dense Battery Cabinets
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery cabinets require multiple high-voltage switch boxes for short circuit protection, resulting in a large size, low capacity density, and high cost, which does not meet market demands for a cost-effective solution.
Innovation Solution
The energy storage device incorporates a high-voltage switch box that manages multiple battery clusters, featuring a short circuit/overload protection circuit, fuses, load switches, contactors, and shunts to control the connection and disconnection of battery clusters to an electrical device, reducing the number of switch boxes needed and optimizing energy density and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple high-voltage switch boxes are used for short circuit protection in each battery pack, then the reliability of short circuit protection is improved, but the device complexity and cost increase, and the capacity density decreases
Solution Approach 1:
The patent merges the high-voltage switch box function from the battery pack level to the battery cabinet level. Instead of having separate switch boxes in each battery pack, a single centralized high-voltage switch box manages multiple battery packs (e.g., 4-8 packs), reducing the total number of switch boxes while maintaining protection capability through centralized control and monitoring of all connected packs.
Solution Approach 2:
The centralized high-voltage switch box serves multiple functions: it provides short circuit protection for multiple battery packs simultaneously, enables independent control of each battery pack's connection to the electrical device, and integrates monitoring of all packs. This multi-functional design replaces what would traditionally require multiple dedicated switch boxes.
2Reliability
If multiple high-voltage switch boxes are installed for each battery pack, then the short circuit protection capability is enhanced, but the occupied area increases and capacity density decreases
Solution Approach 1:
By consolidating multiple switch box functions into a single centralized unit, the physical space required is dramatically reduced. The centralized switch box occupies far less area than multiple distributed switch boxes would require, thereby increasing the available space for battery packs and improving overall capacity density.
3Reliability
If multiple high-voltage switch boxes are used for each battery pack, then the protection coverage is improved, but the cost increases
Solution Approach 1:
The patent reduces manufacturing cost by consolidating from N individual switch boxes (one per battery pack) to a single centralized switch box serving N packs. This reduces component count, assembly complexity, and overall system cost while maintaining equivalent or superior protection capability through centralized monitoring and control of all battery packs.
Data Source
AI summary
An energy storage device and a battery cabinet are provided according to the present disclosure. The energy storage device includes a plurality of battery clusters and a high-voltage switch box. A positive input terminal of the high-voltage switch box is connected to positive electrodes of the plurality of battery clusters, a negative input terminal of the high-voltage switch box is connected to negative electrodes of the plurality of battery clusters, and an output terminal of the high-voltage switch box is configured to connect an electrical device. The high-voltage switch box is configured to control the plurality of battery clusters to be electrically connected to/disconnected from the electrical device. The cost of a battery cabinet is reduced in the present disclosure.