Buck-Boost Battery Module for Multi-Voltage Terminal Power
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Solution Overview
Problem
Current battery modules with different voltage systems face challenges in standardization, leading to reduced service life and safety due to wide charge and discharge voltage ranges and varying input voltage requirements, making it difficult to normalize and efficiently power terminal devices like electric vehicles.
Innovation Solution
A battery module with a detection and control unit, buck-boost unit, and cell pack that dynamically adjusts voltage output based on terminal-required voltages, ensuring optimal operation and standardization across different voltage systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different quantities of serially-connected cells are used to form cell packs for different voltage systems, then the battery module can adapt to various terminal devices, but the charge and discharge voltage ranges become wide and the input voltage range of the load must be very wide, reducing service life and safety
Solution Approach 1:
The patent applies parameter changes by using a buck-boost circuit to dynamically adjust the output voltage of the battery module. Instead of changing the cell configuration for different voltage systems, the system maintains a fixed cell pack and uses the buck-boost circuit to transform the voltage to match different terminal device requirements. This keeps the operating voltage within optimal ranges, improving service life and safety while maintaining adaptability.
Solution Approach 2:
The buck-boost circuit serves as an intermediary between the battery module and terminal devices with different voltage requirements. It acts as a voltage transformation mediator that converts the battery's output voltage to the required terminal voltage, eliminating the need for wide voltage ranges and charge/discharge switches, thereby improving reliability while maintaining versatility.
2Ease of operation
If charge/discharge switches are used to control battery module output based on terminal device status and charger output, then discharge and charge functions are implemented, but the voltage range becomes wide and standardization is difficult
Solution Approach 1:
The patent replaces the complex charge/discharge switch control system with a buck-boost circuit that continuously adjusts voltage output based on terminal device requirements. This parameter transformation approach simplifies the control mechanism while maintaining ease of operation and achieving standardization across different voltage systems.
Solution Approach 2:
The buck-boost circuit provides universal voltage transformation capability that works for both charging and discharging operations across different voltage systems. This single component performs multiple functions that previously required separate charge/discharge switches and complex control logic, reducing device complexity while maintaining ease of operation.
3Reliability
If battery modules are designed for specific voltage systems (36V, 48V, 60V, 72V), then terminal devices can operate at optimal voltage, but the battery modules cannot be normalized and standardized
Solution Approach 1:
The patent uses parameter changes through the buck-boost circuit to transform a single battery module's output to match different terminal device voltage requirements. This allows terminal devices to operate at optimal voltages while the battery module itself remains standardized and normalized, eliminating the need for different battery modules for different voltage systems.
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
This solution enhances the service life and safety of battery modules by ensuring terminal devices operate at optimal input voltages, normalizing battery performance across various voltage systems, and allowing for flexible configuration and charging scenarios.
Implementation Method 1
control the buck-boost unit to discharge to the terminal device through the cell pack based on the terminal-required voltage
Data Source
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AI summary
Embodiments of this application disclose a battery module and a charging system, to improve a service life and safety of the battery module. Embodiments of this application provide a battery module, where the battery module is configured to discharge to a terminal device, and the battery module includes: a detection and control unit, a buck-boost unit, and a cell pack. The detection and control unit is configured to: receive a terminal-required voltage sent by the terminal device; and control the buck-boost unit to discharge to the terminal device through the cell pack based on the terminal-required voltage. Alternatively, the detection and control unit is configured to: receive a first error reference value sent by the terminal device, where the first error reference value is obtained by the terminal device based on the terminal-required voltage and a load input voltage of the terminal device in a first period; obtain a first target output voltage based on the first error reference value and an output voltage of the buck-boost unit in the first period; and control the buck-boost unit to discharge to the terminal device based on the first target output voltage through the cell pack.