Battery Management System
First Claim
1. A system for managing the battery power in an electrically powered vehicle, comprisinga. a system controller boardb. at least one Battery Management System (BMS) board. wherein a BMS board governs the flow of electricity to individual batteries in a manner that causes less highly charged cells to charge first, ensuring that the cells charge evenly, while preventing battery overcharge and maintaining temperature limits;
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Abstract
A battery management system for the propulsion batteries of an electric vehicle comprises means for voltage sensing, temperature sensing, voltage limit sensing, and current limit sensing. Charge control is employed for optimal system operation and ensures cell balancing by detecting the lowest charged cells in a cell stack and charging those cells first, thereby ensuring that all cells charge uniformly. Charge control is accomplished on a battery management circuit board associated with battery cells in a battery box, while control of the battery management board is governed by a system controller board through a controller area network interface. The system controller board uses data from the battery management board to govern charge characteristics of the batteries, and supply data and control functions to a driver interface computer.
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Citations
20 Claims
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1. A system for managing the battery power in an electrically powered vehicle, comprising
a. a system controller board b. at least one Battery Management System (BMS) board. wherein a BMS board governs the flow of electricity to individual batteries in a manner that causes less highly charged cells to charge first, ensuring that the cells charge evenly, while preventing battery overcharge and maintaining temperature limits; - and
c. a Controller Area Network (CAN) bus linking the system controller board and the at least one BMS board. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification