Control system and control method for DC/DC converter
A technology of a control system and a control method, which is applied in the direction of current collectors, energy-saving charging equipment, and reduction of greenhouse gases, can solve problems such as reducing the charging efficiency of power battery packs, and achieve the effect of improving charging efficiency
Active Publication Date: 2013-09-18
BYD CO LTD
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Problems solved by technology
[0003] In order to solve the problem in the prior art that the power battery pack needs to be discharged while being charged, thus reducing the charging efficiency of the power battery pack, the present invention provides a DC / DC converter control that can effectively improve the charging efficiency of the power battery pack System and control method of DC / DC converter
Method used
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no. 1 example
[0033] Such as figure 2 As shown, the first embodiment of the control method of the present invention includes the following steps:
[0034] Step s01, judging whether the battery manager 3 sends a charging signal, if the battery manager 3 does not send a charging signal, return to step s01;
[0035] Step s02, if the battery manager 3 sends a charging signal, judge whether the output current of the DC / DC converter 1 is greater than the set value I1, if the output current of the DC / DC converter 1 is greater than the set value I1, return to step s02;
[0036] Step s03 , if the output current of the DC / DC converter 1 is equal to or less than the set value I1 , the control unit 23 controls the DC / DC converter 1 to shut down.
[0037] Further, after the control unit 23 controls the shutdown of the DC / DC converter 1, the electric power of the starting battery 5 can be fully utilized through the starting battery to supply power to the vehicle electrical appliances. However, if the s...
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The invention provides a control system for a direct current to direct current (DC / DC) converter. The control system is electrically connected with a battery manager which is used for monitoring a power battery pack; the control system comprises the DC / DC converter and a controller for controlling the DC / DC converter; the controller is electrically connected with the battery manager and the DC / DC converter respectively; the controller comprises a detection unit, a judgment unit and a control unit; the detection unit is used for detecting the magnitude of output current of the DC / DC converter and sending information to the judgment unit when receiving a charging signal of the battery manager; the judgment unit is used for performing judgment according information sent by the detection unit; and the control unit is used for controlling the turn-off or turn-on of the DC / DC converter according to the judgment result of the judgment unit. The control system can effectively improve the charging efficiency of the power battery pack.
Description
technical field [0001] The invention belongs to the field of automobile charging, and in particular relates to a control system and a control method of a DC / DC converter. Background technique [0002] At present, in the period of increasing energy shortage, the emergence of electric vehicles and hybrid vehicles will undoubtedly play a positive role in alleviating the energy crisis. The energy source of hybrid electric vehicles and electric vehicles is the power battery pack and starting battery on the car. The power battery pack supplies power to the vehicle electrical appliances through the DC / DC converter. After the vehicle is started, the battery manager controls the DC / DC converter. Power on, so that the DC / DC converter is always in the working state, but when the vehicle charger is charging the power battery pack, the DC / DC converter is always in the working state, and the power battery pack is charged by the DC / DC converter at the same time. Vehicle electrical applian...
Claims
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IPC IPC(8): H02J7/00
CPCY02E70/40Y02E60/10
Inventor 李渤武振杰沈晓峰张建华
Owner BYD CO LTD