Battery system and its battery module and battery control circuit

Abstract

The invention relates to a battery system, a battery module and a battery control circuit therein. The battery module is suitable for the battery system. The battery module is in an enabled state and operates in a bottom mode, a top mode or an intermediate mode; the battery module includes a battery unit and battery control circuit. The battery unit includes at least one battery, and the battery unit outputs the voltage of the battery unit from between the positive terminal and the negative terminal of the battery unit. The battery control circuit is powered by the battery unit voltage to control the battery unit. The battery control circuit includes an enable terminal, an uplink input terminal, an uplink output terminal, a downlink input terminal and a downlink output terminal. When the enable terminal has an operation enable bit On time, or when the uplink input has an uplink enable level, the battery module enters the enable state.

Description

technical field [0001] The present invention relates to a battery system, in particular to a battery system with a daisy chain topology. The invention also relates to battery modules and battery control circuits for use in battery systems. Background technique [0002] The previous cases related to this application include: US patent application US8010724, I2C / SMBUS Ladders and Laddered Enabled ICs, US patent application US 2011 / 0289239 A1, Device Address Assignment in a Bus Cascade System, and US patent application US 2019 / 0006723 A1, Multi -Channel and Bi-directional Battery management System. [0003] In high-power battery systems (such as but not limited to high-power applications such as electric vehicles), the battery system is equipped with a large number of battery modules. In the battery system, the battery modules are usually connected in series to improve the system output of the battery system. Voltage, thereby reducing the current and wire diameter of the powe...

AI Technical Summary

Problems solved by technology

[0006] figure 1 and figure 2 One of the disadvantages of the prior art shown in is that the recognition mode corresponding to each module needs to be set for the battery control circuit one by one, and the setting process is time-consuming and costly

In addition, another shortcoming is that the enabling or disabling of each battery module is set separately through the enabling terminal EN of the respective battery control circuit. However, since each battery module is powered by the voltage provided by its corresponding battery unit (VBM[1]~VBM[n]), therefore, the absolute values ​​of the logic high and low levels of each battery module are not the same, therefore, the enable signal EN[1] provided by the main control circuit 20 needs to be isolated Signal conversion elements (such as transformers) or signal shifting circuits can be converted into enabling signals EN[2]~EN[n] that can control other battery modules correspondingly, and the manufacturing cost of the battery system 1 is thus increased.

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