Electric Vehicle Smart Charging System
An electric vehicle and intelligent charging technology, which is applied to electric vehicles, battery circuit devices, current collectors, etc., can solve the problems of energy loss of the charging device and the inability of the charging device to stop charging immediately, and achieve the effect of saving energy loss
Active Publication Date: 2014-10-01
CHERY AUTOMOBILE CO LTD
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Problems solved by technology
The reason for the floating charge stage is that the charging device cannot stop charging immediately, which leads to unnecessary energy loss of the charging device
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[0015] Hereinafter, the present invention will be described with reference to the drawings and examples.
[0016] figure 1 It is a structural block diagram of an electric vehicle intelligent charging system according to the first embodiment of the present invention. Such as figure 1 As shown, the electric vehicle intelligent charging system of the first embodiment includes a working voltage generating circuit, a reference voltage generating circuit, a comparator, a control circuit and an automatic shutdown circuit at the end of charging. Wherein, the working voltage generation circuit is used for sampling the charging current of the charging device, and generating a working voltage representing the sampled charging current. The reference voltage generation circuit is used to set the reference voltage for automatically shutting down the charging device after the electric vehicle enters the floating charge stage after charging. The comparator is used for comparing the referen...
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The invention provides an intelligent charging system of an electric automobile. The intelligent charging system comprises a working voltage generation circuit, a reference voltage generation circuit, a comparator, a control circuit and an end-of-charge automatic turnoff circuit, wherein the working voltage generation circuit is used for sampling charging current of a charging device and generating a working voltage which represents the sampled charging current; the reference voltage generation circuit is used for automatically turning off a reference voltage of the charging device in the float charge period of the electric automobile after the termination of charge; the comparator is used for comparing the reference voltage with the working voltage and sending a comparison result to the control circuit; the control circuit is used for controlling the end-of-charge automatic turnoff circuit to turn off the charging device when the comparison result shows that the working voltage is less than the reference voltage; and the end-of-charge automatic turnoff circuit is used for turning off the charging device under the control of the control circuit. According to the intelligent charging system of the electric automobile, the charging device can be timely turned off in the float charge period after the termination of charge, so that unnecessary energy loss in the charging device during the float charge period is saved, and the purpose of saving energy is achieved.
Description
technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an intelligent charging system for electric vehicles. Background technique [0002] In the current electric vehicle charging technology, electric vehicle charging is basically divided into three stages: constant current, constant voltage and floating charge. Among them, the floating charge stage is the maintenance state of the battery charging. The reason for the float charge stage is that the charging device cannot stop charging immediately, which leads to unnecessary energy loss of the charging device. The longer the float phase, the more unnecessary energy is lost in the charging unit. Therefore, the ideal situation is to make the charging device end charging as early as possible after entering the floating charge stage after charging, that is, to make the float charge stage as short as possible, thereby reducing or avoiding the floating charge stage in the charging...
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IPC IPC(8): H02J7/00
Inventor 王晓辉
Owner CHERY AUTOMOBILE CO LTD