Charging control circuit, charging system, vehicle and charging control method
A technology of charging control and control circuit, which is applied in the field of charging control circuit, vehicle and charging control, and can solve the problem of waste of electric energy by BMS
Active Publication Date: 2021-07-23
KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
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[0003] The purpose of the embodiment of the present application is to provide a charging control circuit, a charging system, a vehicle and a charging control method, which can improve the problem of waste of electric energy by BMS
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[0052] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It should be noted that terms such as "first" and "second" are only used for distinguishing descriptions, and should not be understood as indicating or implying relative importance.
[0053] During the operation process of using the charger to charge the battery module, the battery management system (Battery Management System, BMS) is used to manage and control the charging process. After that, the BMS cannot enter the dormant state. After that, the BMS will continue to consume the power of the battery module, which will affect the battery life of the battery module or cause the battery module to feed power after a long time. In addition, because the battery module and the battery management system are both in working state, when the system's self-consumption reduces the power of the current battery m...
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The invention provides a charging control circuit, a charging system, a vehicle and a charging control method. The charging control circuit comprises a port protection circuit, a PWM detection circuit and a wake-up control circuit. When the input end of the wake-up control circuit and the input end of the port protection circuit both receive a first input signal formed during the power failure period of the charger, the port protection circuit filters out an interference signal in the first input signal and outputs the first input signal after the interference signal is filtered out to the PWM detection circuit. The wake-up control circuit stops outputting the wake-up signal to the battery management system; when the PWM detection circuit receives the first input signal output by the port protection circuit, the PWM detection circuit outputs a first control signal representing wake-up failure to the battery management system, so that the battery management system enters a dormant state according to the first control signal when the wake-up signal is not received. Electric energy waste caused by the fact that the battery management system cannot enter a dormant state after the charger is powered off can be avoided.
Description
technical field [0001] The present application relates to the field of charging management, in particular, to a charging control circuit, a charging system, a vehicle and a charging control method. Background technique [0002] At present, new energy vehicles mainly use lithium batteries as the power source to provide power for the normal driving of new energy vehicles. The battery management system (Battery Management System, BMS) is responsible for the charge and discharge management of the power battery. In terms of electric vehicle charging, there are currently corresponding standards (refer to the provisions in GB / T18487.1), which are used to regulate the charging of power batteries. In this standard, the CP (Control Pilot, control guidance) signal is defined to confirm the handshake signal of the slow charging current with the battery management system, and also defines the electrical characteristics of the CP signal. Currently, there is a situation where the BMS was...
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IPC IPC(8): B60L58/10B60L3/00B60L53/00H02J7/00
CPCB60L58/10B60L3/00B60L53/00H02J7/0036B60L2240/54Y02T90/14
Inventor 徐童辉
Owner KUNSHAN BAOTRON NEW ENERGY TECH CO LTD