CN104527445A - Power supply control system of electric automobile - Google Patents
Power supply control system of electric automobile Download PDFInfo
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- CN104527445A CN104527445A CN201410736360.8A CN201410736360A CN104527445A CN 104527445 A CN104527445 A CN 104527445A CN 201410736360 A CN201410736360 A CN 201410736360A CN 104527445 A CN104527445 A CN 104527445A
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Abstract
本发明涉及一种电动汽车供电控制系统，包括CAN收发器、MCU控制芯片、监控接口及供电控制电路；所述供电控制电路包括蓄电池、第一供电电源及第二供电电源；所述第一供电电源用于将所述蓄电池电压转换为所述MCU控制芯片、监控接口和CAN收发器的工作电压输出；所述电动汽车处于熄火状态时，所述MCU控制芯片由所述监控接口及所述CAN收发器获取的外部信号唤醒；所述第二供电电源用于在所述MCU控制芯片被唤醒时将所述蓄电池电压转换为所述工作电压输出至外围电路。本发明通过第一供电电源在熄火状态为部分电路供电，并在唤醒状态通过第二供电电源为其他电路供电，既保证了电动汽车的正常使用，又极大降低了非工作状态下的电动汽车的电源功耗。
The present invention relates to an electric vehicle power supply control system, which includes a CAN transceiver, an MCU control chip, a monitoring interface and a power supply control circuit; the power supply control circuit includes a battery, a first power supply and a second power supply; the first power supply The power supply is used to convert the voltage of the storage battery into the working voltage output of the MCU control chip, the monitoring interface and the CAN transceiver; The transceiver is woken up by an external signal; the second power supply is used to convert the battery voltage into the working voltage and output it to the peripheral circuit when the MCU control chip is woken up. The invention supplies power to some circuits through the first power supply in the flame-off state, and supplies power to other circuits through the second power supply in the wake-up state, which not only ensures the normal use of the electric vehicle, but also greatly reduces the power consumption of the electric vehicle in the non-working state. power consumption.
Description
技术领域technical field
本发明涉及电动汽车技术领域，更具体地说，涉及一种电动汽车供电控制系统。The invention relates to the technical field of electric vehicles, and more specifically, relates to a power supply control system for electric vehicles.
背景技术Background technique
目前国内的电动汽车多数采用给控制电路长期供电的方式，整车控制单元和周围的电路一直处于工作状态，使得给这些电路供电的蓄电池始终处于能量消耗状态。另一方面，长时间对各个电子部件进行供电对电子部件的性能磨损及使用寿命也必将产生影响。At present, most electric vehicles in China adopt the method of supplying power to the control circuit for a long time. The control unit of the whole vehicle and the surrounding circuits are always in the working state, so that the batteries that supply power to these circuits are always in a state of energy consumption. On the other hand, supplying power to each electronic component for a long time will also have an impact on performance wear and service life of the electronic component.
新能源汽车技术逐渐由实验室转入产品化阶段，节能、小型化、经济型、重量轻，已成为业内的发展方向，动力控制系统(PCU)作为其核心部件，对其性能参数要求更高，其中功耗的指标就是其中之一。New energy vehicle technology has gradually shifted from the laboratory to the stage of productization. Energy saving, miniaturization, economy, and light weight have become the development direction of the industry. As its core component, the power control system (PCU) has higher requirements for its performance parameters. , where the index of power consumption is one of them.
为了保证车辆长时间待机状态的电能消耗，就需要提供大容量的电池，并需要经常为蓄电池充电来维持电量。由于汽车大部分时间是处于不使用状态，经常给蓄电池充电，必将造成能量的消耗及浪费。In order to ensure the power consumption of the vehicle in the standby state for a long time, it is necessary to provide a large-capacity battery, and it is necessary to charge the battery frequently to maintain the power. Since the car is not in use most of the time, charging the battery frequently will inevitably cause energy consumption and waste.
发明内容Contents of the invention
本发明要解决的技术问题在于，针对现有电动汽车功耗大的缺陷，提供一种电动汽车供电控制系统。The technical problem to be solved by the present invention is to provide a power supply control system for electric vehicles in view of the defect of large power consumption of existing electric vehicles.
本发明解决其技术问题所采用的技术方案是：构造一种电动汽车供电控制系统，所述控制系统至少包括CAN收发器、MCU控制芯片、监控接口及供电控制电路；The technical solution adopted by the present invention to solve the technical problem is to construct a power supply control system for an electric vehicle, the control system at least including a CAN transceiver, an MCU control chip, a monitoring interface and a power supply control circuit;
所述供电控制电路包括蓄电池、第一供电电源及第二供电电源；The power supply control circuit includes a storage battery, a first power supply and a second power supply;
所述第一供电电源的输入端与所述蓄电池的输出端相连、输出端分别连接至所述MCU控制芯片、监控接口和CAN收发器，并用于将所述蓄电池电压转换为所述MCU控制芯片、监控接口和CAN收发器的工作电压输出；The input end of the first power supply is connected to the output end of the battery, and the output ends are respectively connected to the MCU control chip, the monitoring interface and the CAN transceiver, and are used to convert the battery voltage to the MCU control chip , monitoring interface and working voltage output of CAN transceiver;
所述电动汽车处于熄火状态时，所述MCU控制芯片、监控接口和CAN收发器由第一供电电源供电且为休眠状态，该MCU控制芯片由所述监控接口及所述CAN收发器获取的外部信号唤醒；When the electric vehicle is in the flame-off state, the MCU control chip, the monitoring interface and the CAN transceiver are powered by the first power supply and are in a dormant state, and the MCU control chip is obtained by the monitoring interface and the CAN transceiver. signal wake-up;
所述第二供电电源的输入端与所述蓄电池的输出端相连，并在所述MCU控制芯片被唤醒时将所述蓄电池电压转换为所述工作电压输出至外围电路。The input end of the second power supply is connected to the output end of the battery, and when the MCU control chip is woken up, the voltage of the battery is converted into the working voltage and output to the peripheral circuit.
在根据本发明所述的电动汽车供电控制系统中，所述MCU控制芯片在所述休眠状态下的电流消耗为100uA级。In the electric vehicle power supply control system according to the present invention, the current consumption of the MCU control chip in the sleep state is 100 uA.
在根据本发明所述的电动汽车供电控制系统中，所述监控接口包括充电开关接口、空调开关接口和/或ON档信号接口。In the electric vehicle power supply control system according to the present invention, the monitoring interface includes a charging switch interface, an air conditioner switch interface and/or an ON gear signal interface.
在根据本发明所述的电动汽车供电控制系统中，所述CAN收发器在所述休眠状态时的电流消耗为5uA。In the electric vehicle power supply control system according to the present invention, the current consumption of the CAN transceiver in the sleep state is 5uA.
在根据本发明所述的电动汽车供电控制系统中，所述第一供电电源包括第一开关电源芯片，所述蓄电池的输出端经过所述第一开关电源芯片转换为对应的工作电压输出。In the electric vehicle power supply control system according to the present invention, the first power supply includes a first switching power supply chip, and the output terminal of the storage battery is converted into a corresponding working voltage output through the first switching power supply chip.
在根据本发明所述的电动汽车供电控制系统中，所述第二供电电源与所述蓄电池之间连接有开关，且该开关由MCU控制芯片控制导通或断开。In the electric vehicle power supply control system according to the present invention, a switch is connected between the second power supply source and the storage battery, and the switch is controlled to be turned on or off by the MCU control chip.
在根据本发明所述的电动汽车供电控制系统中，所述第二供电电源包括第二开关电源芯片，所述蓄电池的输出端依次经过所述开关以及所述第二开关电源芯片转换为所述外围电路的工作电压输出。In the electric vehicle power supply control system according to the present invention, the second power supply includes a second switching power supply chip, and the output terminal of the storage battery is converted into the The working voltage output of the peripheral circuit.
在根据本发明所述的电动汽车供电控制系统中，所述休眠状态下，所述供电控制系统的电流总消耗≤1mA。In the electric vehicle power supply control system according to the present invention, in the dormant state, the total current consumption of the power supply control system is ≤1mA.
实施本发明的电动汽车供电控制系统，具有以下有益效果：通过第一供电电源提供工作电压，保证在电动汽车熄火状态下对电动汽车部分电路供电，进而确保电动汽车的唤醒，也最大程度地降低了待机功耗；而第二供电电源则在电动汽车MCU控制芯片被唤醒时输出工作电压以满足电动汽车的正常工作需求；既保证了电动汽车的正常使用，又极大降低了非工作状态下的电动汽车的电源功耗，同时方便了用户使用。The electric vehicle power supply control system implementing the present invention has the following beneficial effects: the operating voltage is provided by the first power supply to ensure power supply to some circuits of the electric vehicle when the electric vehicle is turned off, thereby ensuring the wake-up of the electric vehicle and minimizing the The standby power consumption is reduced; while the second power supply outputs the working voltage when the MCU control chip of the electric vehicle is awakened to meet the normal working requirements of the electric vehicle; it not only ensures the normal use of the electric vehicle, but also greatly reduces the The power consumption of electric vehicles is improved, and at the same time, it is convenient for users to use.
附图说明Description of drawings
下面将结合附图及实施例对本发明作进一步说明，附图中：The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:
图1为根据本发明的电动汽车供电控制系统的结构示意图；Fig. 1 is a schematic structural view of an electric vehicle power supply control system according to the present invention;
图2是图1所示电动汽车供电控制系统的监控接口的示意图；Fig. 2 is a schematic diagram of a monitoring interface of the electric vehicle power supply control system shown in Fig. 1;
图3是图1所示电动汽车供电控制系统的详细示意图。FIG. 3 is a detailed schematic diagram of the electric vehicle power supply control system shown in FIG. 1 .
具体实施方式Detailed ways
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
如图1所示，本发明提供了一种电动汽车供电控制系统。具体地，该控制系统至少包括CAN收发器14、MCU控制芯片15、监控接口16及供电控制电路1。在该电动汽车供电控制系统中，供电控制电路1用于对电动汽车供电，所述供电控制电路1包括蓄电池10、第一供电电源11及第二供电电源12。其中在电动汽车处于熄火状态时，蓄电池10经第一供电电源11向MCU控制芯片15、监控接口16及CAN收发器14等输出工作电压，确保电动汽车的唤醒；当电动汽车处于正常工作状态时，蓄电池10经第一供电电源11和第二供电电源12分别向对应的电路输出工作电压，以满足电动汽车的正常工作需求。As shown in Fig. 1, the present invention provides a power supply control system for an electric vehicle. Specifically, the control system at least includes a CAN transceiver 14 , an MCU control chip 15 , a monitoring interface 16 and a power supply control circuit 1 . In the electric vehicle power supply control system, the power supply control circuit 1 is used to supply power to the electric vehicle, and the power supply control circuit 1 includes a battery 10 , a first power supply 11 and a second power supply 12 . Wherein when electric vehicle is in flameout state, storage battery 10 outputs working voltage to MCU control chip 15, monitoring interface 16 and CAN transceiver 14 etc. through first power supply 11, guarantees the wake-up of electric vehicle; The storage battery 10 respectively outputs operating voltages to corresponding circuits through the first power supply 11 and the second power supply 12, so as to meet the normal operation requirements of the electric vehicle.
其中，第一供电电源11的输入端与蓄电池10的输出端相连，第一供电电源11的输出端分别连接至MCU控制芯片15、监控接口16和CAN收发器14；所述第一供电电源11用于将所述蓄电池10电压转换为MCU控制芯片15、监控接口16和CAN收发器14的工作电压输出。Wherein, the input end of the first power supply 11 is connected with the output end of battery 10, and the output end of the first power supply 11 is respectively connected to MCU control chip 15, monitoring interface 16 and CAN transceiver 14; Described first power supply 11 It is used to convert the voltage of the storage battery 10 into the working voltage output of the MCU control chip 15 , the monitoring interface 16 and the CAN transceiver 14 .
所述电动汽车处于熄火状态时，MCU控制芯片15、监控接口16和CAN收发器14由第一供电电源12供电且所述MCU控制芯片15为休眠状态，经监控接口16及CAN收发器14获取外部信号，并根据所述外部信号唤醒MCU控制芯片15。所述外部信号例如可以是ON档信号、充电开关信号和/或空调开关信号，和/或MCU程序设定信号等。When the electric vehicle was in the flameout state, the MCU control chip 15, the monitoring interface 16 and the CAN transceiver 14 were powered by the first power supply 12 and the MCU control chip 15 was in a dormant state, which was obtained through the monitoring interface 16 and the CAN transceiver 14. external signal, and wake up the MCU control chip 15 according to the external signal. The external signal may be, for example, an ON gear signal, a charge switch signal and/or an air conditioner switch signal, and/or an MCU program setting signal, and the like.
所述第二供电电源12的输入端与所述蓄电池10的输出端相连，所述第二供电电源12用于在所述MCU控制芯片15被唤醒时将所述蓄电池10的电压转换为所述工作电压输出至外围电路。The input end of the second power supply 12 is connected to the output end of the storage battery 10, and the second power supply 12 is used to convert the voltage of the storage battery 10 to the The working voltage is output to the peripheral circuit.
本发明中的第一供电电源11和第二供电电源12中均包括开关电源芯片及周边电路。在具体实现时，第一供电电源220可以包括第一开关电源芯片，蓄电池10的输出端直接通过第一开关电源芯片转换为工作电压输出供电。第二供电电源12可以包括第二开关电源芯片，蓄电池10的输出端先经过开关13(该开关13由MCU控制芯片15控制导通或断开)，再通过第二开关电源芯片转换为所述工作电压输出供电。当然，上述开关13也可集成到第二供电电源12，即第二供电电源12直接由MCU控制芯片15启动。Both the first power supply 11 and the second power supply 12 in the present invention include switching power supply chips and peripheral circuits. In a specific implementation, the first power supply 220 may include a first switching power supply chip, and the output terminal of the storage battery 10 is directly converted to a working voltage output power supply by the first switching power supply chip. The second power supply 12 can include a second switching power supply chip, and the output terminal of the storage battery 10 first passes through the switch 13 (the switch 13 is controlled by the MCU control chip 15 to turn on or off), and then is converted to the second switching power supply chip by the second switching power supply chip. Operating voltage output power supply. Of course, the above-mentioned switch 13 can also be integrated into the second power supply 12 , that is, the second power supply 12 is directly activated by the MCU control chip 15 .
上述第一开关电源芯片和第二开关电源芯片均可以采用现有技术中已知的开关电源芯片及周边电路，因此不做赘述。Both the above-mentioned first switching power supply chip and the second switching power supply chip can adopt switching power supply chips and peripheral circuits known in the prior art, so details are not described here.
MCU控制芯片15在休眠状态下时仅最小系统电路工作，该最小系统电路的电流损耗为100uA。而CAN收发器在此状态下的电流损耗小于10uA，优选仅5uA，而监控接口16为高电平有效，因此正常情况下不消耗电流，因此通过计算可知在本发明的电动汽车供电控制系统中，休眠状态下，电动汽车的总功耗≤1mA。因此，本发明的电动汽车供电控制系统能在休眠状态下有效减小电流损耗，进而延长对应部件的使用寿命，提升电动汽车的性能。When the MCU control chip 15 is in the sleep state, only the minimum system circuit works, and the current consumption of the minimum system circuit is 100uA. The current consumption of the CAN transceiver in this state is less than 10uA, preferably only 5uA, and the monitoring interface 16 is active at high level, so it does not consume current under normal conditions, so it can be known by calculation that in the electric vehicle power supply control system of the present invention , in the sleep state, the total power consumption of the electric vehicle is ≤1mA. Therefore, the electric vehicle power supply control system of the present invention can effectively reduce the current consumption in the dormant state, thereby prolonging the service life of corresponding components and improving the performance of the electric vehicle.
而在监控接口16和/或CAN收发器接收到外部信号的情况下，系统可根据该外部信号唤醒MCU控制芯片15，此时MCU控制芯片15向开关13输出导通信号，蓄电池10经开关13启动第二供电电源12的第二开关电源芯片，并进一步获得电压调整，输出相应的工作电压以启动其他外围电路17。And under the situation that monitoring interface 16 and/or CAN transceiver receive external signal, system can wake up MCU control chip 15 according to this external signal, and this moment, MCU control chip 15 outputs conduction signal to switch 13, and storage battery 10 passes through switch 13 Start the second switching power supply chip of the second power supply 12 , and further obtain voltage adjustment, and output corresponding working voltage to start other peripheral circuits 17 .
参考图2，该监控接口16用于采集外部开关控制信号给所述最小系统电路，该监控接口16进一步包括充电开关接口132、空调开关接口163和/或ON档信号接口161。Referring to FIG. 2 , the monitoring interface 16 is used to collect external switch control signals to the minimum system circuit. The monitoring interface 16 further includes a charging switch interface 132 , an air conditioner switch interface 163 and/or an ON signal interface 161 .
所述MCU控制芯片15的最小系统电路可以包括MCU电源、复位芯片和晶振电路等。该最小系统电路可以根据上述监控接口16采集的外部开关控制信号，产生电动车控制信号实现整车工况的控制。The minimum system circuit of the MCU control chip 15 may include an MCU power supply, a reset chip, a crystal oscillator circuit, and the like. The minimum system circuit can generate electric vehicle control signals according to the external switch control signals collected by the monitoring interface 16 to realize the control of the working conditions of the entire vehicle.
具体地，例如，在车钥匙插入时，ON档开关接口161处发生信号转变，当处于ON状态时，MCU控制芯片15被唤醒进入正常工作状态，发出信号接通开关13使第二供电电源12上电，电动汽车进入准备工作状态。Specifically, for example, when the car key is inserted, a signal transition occurs at the ON gear switch interface 161. When it is in the ON state, the MCU control chip 15 is awakened and enters a normal working state, and a signal is sent to turn on the switch 13 to make the second power supply 12 When powered on, the electric vehicle enters the ready-to-work state.
当电动汽车的储能电池需要充电时，MCU控制芯片15根据监控接口16处获得的充电开关信号随之进入正常工作模式，发出信号接通开关13使第二供电电源12上电，电动汽车进入准备工作状态。When the energy storage battery of the electric vehicle needs to be charged, the MCU control chip 15 enters the normal working mode according to the charging switch signal obtained at the monitoring interface 16, sends a signal to turn on the switch 13 to power on the second power supply 12, and the electric vehicle enters Ready to work.
当开启开空调开关时，MCU控制芯片15根据监控接口16处获得的空调开关信号随之进入正常工作模式，发出信号接通开关13使第二供电电源12上电，电动汽车进入准备工作状态。When the air-conditioning switch is turned on, the MCU control chip 15 enters the normal working mode according to the air-conditioning switch signal obtained at the monitoring interface 16, and sends a signal to turn on the switch 13 so that the second power supply 12 is powered on, and the electric vehicle enters the ready-to-work state.
当通过CAN收发器14处获得MCU程序设定信号时，也可以唤醒MCU控制芯片15，进而通过MCU控制芯片15对控制系统进行监控和修改MCU的程序，并进入正常的工作状态中。When the MCU program setting signal is obtained through the CAN transceiver 14, the MCU control chip 15 can also be woken up, and then the control system is monitored and modified by the MCU control chip 15, and the MCU program is entered into a normal working state.
参考图3，图3中单独框框出了MCU最小系统下的工作单元，其中蓄电池10经第一供电电源11转换后向MCU最小系统下的其他部件提供+5V的工作电压。由于在最小系统中，CAN收发器14及图2中所示的监控接口16处于开启状态，接收外部信号，并且分别将接收到的外部信号传递至CAN收发电路140、充电开关电路164、空调开关信号电路165或ON档信号电路166，并分别经CAN收发电路140、充电开关电路164、空调开关信号电路165或ON档信号电路166处理后传递至MCU控制芯片15的各个对应接口。MCU控制芯片15由此被唤醒，进而输出控制信号至第二供电电源12(集成有由MCU控制芯片15控制的开关电路)，使第二供电电源12处于工作状态，由第二供电电源12对蓄电池10的输出电压进行转换并提供+5V供电电压至其他外围电路17。Referring to FIG. 3 , the working unit under the MCU minimum system is separately framed in FIG. 3 , wherein the storage battery 10 provides +5V working voltage to other components under the MCU minimum system after being converted by the first power supply 11 . Because in the minimum system, the CAN transceiver 14 and the monitoring interface 16 shown in FIG. The signal circuit 165 or the ON signal circuit 166 are respectively processed by the CAN transceiver circuit 140 , the charging switch circuit 164 , the air conditioner switch signal circuit 165 or the ON signal circuit 166 and then transmitted to each corresponding interface of the MCU control chip 15 . The MCU control chip 15 is woken up thus, and then outputs a control signal to the second power supply 12 (integrated with a switch circuit controlled by the MCU control chip 15), so that the second power supply 12 is in a working state, and the second power supply 12 controls the power supply. The output voltage of the storage battery 10 is converted and provides +5V power supply voltage to other peripheral circuits 17 .
所消耗的电流比较小，直接使用LDO电源就可以满足温升要求，不需要BUCK电源，这样有利于EMC测试的结果，对整车的抗干扰性能有极大的提升。The current consumed is relatively small, and the temperature rise requirements can be met by directly using the LDO power supply, without the need for a BUCK power supply, which is beneficial to the results of the EMC test and greatly improves the anti-interference performance of the vehicle.
进一步地，当MCU控制芯片15接受到外部信号被唤醒后，MCU控制芯片15进入正常工作模式，第二供电电源12将外围电路17所必需的+5V电源接通，使外围电路17上电。Further, when the MCU control chip 15 is woken up by receiving an external signal, the MCU control chip 15 enters the normal working mode, and the second power supply 12 connects the necessary +5V power supply of the peripheral circuit 17 to power the peripheral circuit 17.
若电动汽车进入充电模式，此时充电模式下，MCU控制芯片15将所必需的开关信号电路(如预充回路接触器和车载充电接触器等)依次打开，同时会接收到外部信号，以判别是直流充电机还是交流充电机，以及要充电的电流大小。MCU控制芯片15会将这些信号进行辨别后，通过CAN收发器14发送到相应的其它外围模块电路。当储能蓄电池充满电后，会接受到充满信号，断开充电设备。当外部充电开关关闭后，MCU控制芯片15又进入休眠模式。If the electric vehicle enters the charging mode, under the charging mode at this time, the MCU control chip 15 will open the necessary switching signal circuits (such as the pre-charging circuit contactor and the vehicle charging contactor, etc.) in sequence, and will receive external signals at the same time to distinguish Is it a DC charger or an AC charger, and the current to be charged. The MCU control chip 15 will distinguish these signals and send them to other corresponding peripheral module circuits through the CAN transceiver 14 . When the energy storage battery is fully charged, it will receive a full signal and disconnect the charging device. After the external charging switch is turned off, the MCU control chip 15 enters the sleep mode again.
若电动汽车进入准备运行模式，此时MCU控制芯片15会相应的先打开必需的电源继电器，进入汽车运行前的准备工作。如进行绝缘监测检查、必要的信号自检。If the electric vehicle enters the ready-to-run mode, the MCU control chip 15 will correspondingly open the necessary power relays at this moment, and enter into the preparatory work before the operation of the vehicle. Such as insulation monitoring inspection, necessary signal self-inspection.
在处理运行中，必要检测信号如加速踏板信号、刹车踏板信号、档位信号、钥匙开关信号、碰撞信号、真空泵传感器信号、制动液压力传感器信号、车速信号、高压互锁、空调使能信号、暖风机(PTC)使能信号、EPS故障信号和ESP信号等，同时需要控制输出的信号有：传感器电源、低速风扇继电器、高速风扇继电器、空调系统接触器、主驱动接触器、和暖风机(PTC)接触器等。During processing operation, necessary detection signals such as accelerator pedal signal, brake pedal signal, gear signal, key switch signal, collision signal, vacuum pump sensor signal, brake fluid pressure sensor signal, vehicle speed signal, high-voltage interlock, air conditioner enabling signal , heater (PTC) enable signal, EPS fault signal and ESP signal, etc. At the same time, the signals that need to control the output include: sensor power supply, low-speed fan relay, high-speed fan relay, air conditioning system contactor, main drive contactor, and heater (PTC) contactor, etc.
本发明通过采用第一供电电源提供工作电压，保证在电动汽车熄火状态下时对电动汽车部分电路供电，进而确保电动汽车的唤醒，也最大程度地降低了待机功耗；而第二供电电源则在电动汽车MCU控制芯片被唤醒时，输出所述工作电压以满足电动汽车的正常工作需求；既保证了电动汽车的正常使用，又极大降低了非工作状态下的电动汽车的电源功耗，同时方便了用户使用，相对延长了电动汽车的使用寿命。The present invention provides working voltage by using the first power supply to ensure power supply to some circuits of the electric vehicle when the electric vehicle is turned off, thereby ensuring the wake-up of the electric vehicle and reducing the standby power consumption to the greatest extent; while the second power supply is When the MCU control chip of the electric vehicle is woken up, the operating voltage is output to meet the normal operating requirements of the electric vehicle; it not only ensures the normal use of the electric vehicle, but also greatly reduces the power consumption of the electric vehicle in the non-working state. At the same time, it is convenient for users to use, and relatively prolongs the service life of the electric vehicle.
本发明是根据特定实施例进行描述的，但本领域的技术人员应明白在不脱离本发明范围时，可进行各种变化和等同替换。此外，为适应本发明技术的特定场合或材料，可对本发明进行诸多修改而不脱离其保护范围。因此，本发明并不限于在此公开的特定实施例，而包括所有落入到权利要求保护范围的实施例。The present invention has been described based on specific embodiments, but those skilled in the art will understand that various changes and equivalent substitutions can be made without departing from the scope of the present invention. In addition, many modifications may be made to adapt the technique to a particular situation or material without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed herein, but include all embodiments falling within the scope of the appended claims.
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