技术领域technical field
本发明属于汽车蓄电池技术领域，涉及一种汽车低压电源充电装置。The invention belongs to the technical field of automobile accumulators, and relates to an automobile low-voltage power supply charging device.
背景技术Background technique
在整车低压电源中，DC/DC逆变电源和12V蓄电池电源是并接在整车用电器电路中。在车辆行驶时一般蓄电池不放电，用电器的电流全部由DC/DC逆变器供给，只有当用电器负载突然增大等情况下，蓄电池开始放电。ACC档位是“不发动车可以给车内部分电器供电电器”，ON档位是“给车内所有电器供电”，在ACC或ON档位状态下，工作时所用的电源均为低压蓄电池提供，如ACC档位时欣赏音乐所用电源。In the low-voltage power supply of the vehicle, the DC/DC inverter power supply and the 12V battery power supply are connected in parallel to the electrical circuit of the vehicle. Generally, the battery does not discharge when the vehicle is running, and the current of the electrical appliances is all supplied by the DC/DC inverter. Only when the load of the electrical appliances suddenly increases, the battery starts to discharge. The ACC gear is "powering some electrical appliances in the car without starting the car", and the ON gear is "powering all electrical appliances in the car". In the state of ACC or ON gear, the power used for work is provided by low-voltage batteries. , such as the power supply used for enjoying music when the ACC gear is in place.
在ACC或ON档位状态下长时间使用电器，将会造成蓄电池过度放电，放电的结果是蓄电池极板表层的活性物质(Pb，PbO2)大部分反应成体积较大的PbSO4，堵塞了极板的孔隙，使内部的电解液密度快速下降，因此过度放电后蓄电池端电压很小。如果此时给蓄电池充电，大量的PbSO4很快还原成Pb和PbO2，同时在极板内由于硫酸骤增使电解液密度迅速增大，蓄电池的电流会异常的增大。综上所述充电电流过大，对蓄电池有很多危害，会造成大量的活性物质脱落，造成自放电甚至极板短路，缩短蓄电池使用寿命。Using electrical appliances for a longtime in the ACC or ON gear state will cause the battery to over- discharge. The pores of the plate make the density of the electrolyte inside decrease rapidly, so the terminal voltage of the battery is very small after excessive discharge. If the battery is charged at this time, a large amount of PbSO4 will be quickly reduced to Pb and PbO2 , and at the same time, the density of the electrolyte will increase rapidly due to the sudden increase of sulfuric acid in the plate, and the current of the battery will increase abnormally. To sum up, if the charging current is too large, it will cause a lot of harm to the battery, causing a large amount of active material to fall off, causing self-discharge and even a short circuit of the plates, shortening the service life of the battery.
蓄电池在充电过程中，还会存在发热的问题，特别是大电流充放电时最容易造成蓄电池发热。电池内部温度升高，会造成电池内阻下降，反过来充电电流又会进一步增加，内阻则更进一步下降，如此恶性循环会出现热失控造成电池壳体严重变形甚至涨裂。During the charging process of the battery, there will also be a problem of heating, especially when charging and discharging with a large current, it is most likely to cause the battery to heat up. An increase in the internal temperature of the battery will cause the internal resistance of the battery to decrease. In turn, the charging current will further increase, and the internal resistance will further decrease. In this vicious cycle, thermal runaway will occur and the battery case will be severely deformed or even cracked.
现有技术是将12V蓄电池电路与整车用电器电路并接在一起，与DC/DC装置输出端连接。这样的电路结构缺点是如果限制DC/DC的输出电流，就有可能无法满足用电器出现大负荷电流的要求，如果不限制DC/DC的电流，就会出现蓄电池大电流充电的现象，对蓄电池造成危害。因此需要寻找一种即能满足蓄电池小电流充电的要求，又要满足大负荷用电器对电源的需求。The prior art is to connect the 12V storage battery circuit and the electric circuit of the whole vehicle in parallel, and connect them to the output end of the DC/DC device. The disadvantage of such a circuit structure is that if the output current of the DC/DC is limited, it may not be able to meet the requirements of the large load current of the electrical appliance. cause harm. Therefore, it is necessary to find a battery that can meet the requirements of low-current charging of the storage battery and also meet the needs of large-load electrical appliances for power supply.
发明内容Contents of the invention
本发明针对现有的技术存在上述问题，提出了一种汽车低压电源充电装置，该充电装置即能满足蓄电池以小电流方式充电又能满足汽车内大负荷用电器对电源的需求。The present invention aims at the above-mentioned problems in the prior art, and proposes a low-voltage power supply charging device for automobiles. The charging device can not only meet the charging requirements of the storage battery in a low-current mode, but also meet the power requirements of the large-load electrical appliances in the automobile.
本发明通过下列技术方案来实现：一种汽车低压电源充电装置，包括汽车DC/DC逆变电源和蓄电池，所述的汽车DC/DC逆变电源的输出端对车载用电器供电，其特征在于，所述的汽车DC/DC逆变电源的输出端还通过稳压限流器对蓄电池充电，所述的稳压限流器与能够控制稳压限流器导通或者截止的控制单元连接，在稳压限流器的两端并联续流二极管使蓄电池对车载用电器供电。The present invention is achieved through the following technical solutions: a low-voltage power supply charging device for automobiles, including automobile DC/DC inverter power supply and storage battery, the output end of the automobile DC/DC inverter power supply supplies power to vehicle electrical appliances, and is characterized in that , the output terminal of the automobile DC/DC inverter power supply also charges the storage battery through a voltage regulator current limiter, and the voltage regulator current limiter is connected to a control unit capable of controlling the voltage regulator current limiter to be turned on or off, A freewheeling diode is connected in parallel at both ends of the voltage stabilizing current limiter so that the storage battery supplies power to the vehicle electrical appliances.
在汽车运行时，DC/DC逆变电源一路直接给车载用电器供电，另一支路由控制单元根据蓄电池的实际充电需求控制稳压限流器的导通和截止时长来控制蓄电池的充电电流的大小，确保蓄电池是小电流充电。同时当不发动车子需要给部分电器用电或是在负载忽然增大时，蓄电池通过二极管的反向导通原理，直接给车载用电器供电。When the car is running, one DC/DC inverter directly supplies power to the on-board electrical appliances, and the other branch is controlled by the control unit according to the actual charging demand of the battery to control the conduction and cut-off time of the voltage regulator current limiter to control the charging current of the battery. size, to ensure that the battery is charged with a small current. At the same time, when the car does not start and needs to power some electrical appliances or when the load suddenly increases, the battery directly supplies power to the on-board electrical appliances through the reverse conduction principle of the diode.
在上述的汽车低压电源充电装置中，所述的控制单元包括触发器、用于检测蓄电池温度的温度传感器和用于检测蓄电池充电电流的电流传感器，所述温度传感器的输出端和电流传感器的输出端分别与触发器的输入端连接，所述触发器的输出端与稳压限流器的输入端连接。In the above-mentioned vehicle low-voltage power supply charging device, the control unit includes a trigger, a temperature sensor for detecting the temperature of the battery, and a current sensor for detecting the charging current of the battery, and the output terminal of the temperature sensor and the output of the current sensor The terminals are respectively connected to the input terminals of the flip-flop, and the output terminals of the flip-flop are connected to the input terminals of the voltage stabilizing current limiter.
温度传感器检测蓄电池用于放电产生的热量，且检测到的温度信号由触发器接收。根据检测到的温度触动触发器来控制与之连接的稳压限流器的输出电流来调整给蓄电池的充电电流，以及当检测到的蓄电池温度高于设定的极限温度，稳压限流器暂停给蓄电池充电。同时电流传感器检测蓄电池的实际需求电流并输送给触发器，触发器控制稳压限流器的输入电流来控制输出给蓄电池所需的电流，并限制最大充电电流。确保给蓄电池充电电流在当前温度和所需电流的内部环境下是最适合的充电电流，且达到实时调整，减少对蓄电池的伤害，延长蓄电池的使用寿命。The temperature sensor detects the heat generated by the battery for discharging, and the detected temperature signal is received by the trigger. According to the detected temperature trigger trigger to control the output current of the connected voltage regulator current limiter to adjust the charging current to the battery, and when the detected battery temperature is higher than the set limit temperature, the voltage regulator current limiter Suspend charging the battery. At the same time, the current sensor detects the actual demand current of the battery and sends it to the trigger. The trigger controls the input current of the voltage regulator current limiter to control the current required to output to the battery and limit the maximum charging current. Ensure that the charging current for the battery is the most suitable charging current under the internal environment of the current temperature and the required current, and achieve real-time adjustment to reduce damage to the battery and prolong the service life of the battery.
在上述的汽车低压电源充电装置中，所述的温度传感器设置在蓄电池的侧壁上，且温度传感器的电源端与上述的蓄电池连接。通过蓄电池给温度传感器供电，且把温度传感器的检测端设置于蓄电池的侧壁上，能够近距离的检测蓄电池的实际温度。且由蓄电池本身供电，缩短电源和温度传感器的拉导线距离。In the above-mentioned vehicle low-voltage power supply charging device, the temperature sensor is arranged on the side wall of the storage battery, and the power supply end of the temperature sensor is connected to the above-mentioned storage battery. The temperature sensor is powered by the storage battery, and the detection end of the temperature sensor is arranged on the side wall of the storage battery, so that the actual temperature of the storage battery can be detected at close range. And it is powered by the storage battery itself, shortening the distance between the power supply and the pulling wires of the temperature sensor.
在上述的汽车低压电源充电装置中，所述的电流传感器设置在蓄电池和稳压限流器之间导线上，且电流传感器的电源端与上述的蓄电池连接。由蓄电池给电流传感器供电，电流传感器设置于蓄电池充电线路上，让充电线路穿过电流传感器内圈，当充电电流穿过电流传感器，通过磁感应效应检测到蓄电池所需充电电流。In the above-mentioned vehicle low-voltage power supply charging device, the current sensor is arranged on the wire between the storage battery and the voltage regulator current limiter, and the power supply terminal of the current sensor is connected to the above-mentioned storage battery. The current sensor is powered by the battery, and the current sensor is set on the battery charging line, so that the charging line passes through the inner circle of the current sensor. When the charging current passes through the current sensor, the required charging current of the battery is detected through the magnetic induction effect.
在上述的汽车低压电源充电装置中，所述的稳压限流器包括三极管，上述的触发器的输入端与三极管的基极连接，三极管的集电极与汽车DC/DC逆变电源的输出端连接，三极管的发射极与蓄电池的正极连接。In the above-mentioned automobile low-voltage power supply charging device, the described voltage stabilizing current limiter includes a triode, the input end of the above-mentioned trigger is connected with the base of the triode, and the collector of the triode is connected with the output end of the automobile DC/DC inverter power supply. Connection, the emitter of the triode is connected to the positive pole of the battery.
三极管具有给定基极一个电流，则可控制三极管的集电极向发射极导通，根据上述连接，触发器控制三极管的基极的电压供给，三极管的集电极和发射极的导通和关断时间，从而控制DC/DC逆变电源给蓄电池进行充电的电流是蓄电池当前最适合的小电流。The triode has a given base current, which can control the conduction of the collector of the triode to the emitter. According to the above connection, the flip-flop controls the voltage supply of the base of the triode, the turn-on and turn-off time of the collector and emitter of the triode , so that the current for controlling the DC/DC inverter power supply to charge the battery is the most suitable small current for the battery.
作为稳压限流器的第二种方案，在上述的汽车低压电源充电装置中，所述的稳压限流器包括IGBT，上述的触发器的输入端与IGBT的门极连接，IGBT的集电极与汽车DC/DC逆变电源的输出端连接，IGBT的发射极与蓄电池的正极连接。触发器控制向IGBT门极施加电压，从而控制IGBT的集电极和发射极的导通和关断时间变化来控制输出电流大小，保证了DC/DC逆变电源给蓄电池进行充电的电流是蓄电池当前最适合的小电流。As the second scheme of the voltage stabilizing current limiter, in the above-mentioned automobile low-voltage power supply charging device, the described voltage stabilizing current limiter includes an IGBT, the input end of the above-mentioned trigger is connected to the gate of the IGBT, and the set of the IGBT The electrodes are connected to the output terminal of the automobile DC/DC inverter power supply, and the emitter of the IGBT is connected to the positive pole of the battery. The trigger controls the voltage applied to the gate of the IGBT, thereby controlling the change of the turn-on and turn-off time of the collector and emitter of the IGBT to control the output current, ensuring that the current charged by the DC/DC inverter power supply to the battery is the current of the battery Most suitable for small currents.
在上述的汽车低压电源充电装置中，所述续流二级管的阳极与蓄电池的正极连接，续流二极管的阴极与汽车DC/DC逆变电源连接。这样的连接方式是为了保证汽车DC/DC逆变电源不能直接给蓄电池导通，当负载突然增大或DC/DC逆变电源停止供电时，连接蓄电池的二极管正极电压大于此时二极管负极电压，即为在二极管的外界有正向电压偏置，外界电场和二极管自建内部电场的互相抑消作用使载流子的扩散电流增加从而引起正向电流。由此蓄电池电流能够流过二极管的正极实现二极管正向导通的原理，给用电器供电。In the vehicle low-voltage power supply charging device described above, the anode of the freewheeling diode is connected to the positive pole of the storage battery, and the cathode of the freewheeling diode is connected to the DC/DC inverter power supply of the vehicle. This connection method is to ensure that the DC/DC inverter power supply of the car cannot directly conduct to the battery. When the load suddenly increases or the DC/DC inverter power supply stops supplying power, the voltage of the anode of the diode connected to the battery is greater than the voltage of the cathode of the diode at this time. That is, there is a forward voltage bias outside the diode, and the mutual suppression and cancellation of the external electric field and the self-built internal electric field of the diode increases the diffusion current of the carrier, thereby causing a forward current. Thus, the battery current can flow through the anode of the diode to realize the principle of forward conduction of the diode, and supply power to the consumer.
在上述的汽车低压电源充电装置中，所述触发器为D触发器或者JK触发器In the above-mentioned automobile low-voltage power supply charging device, the trigger is a D flip-flop or a JK flip-flop
现有技术相比，本发明具有以下优点：Compared with the prior art, the present invention has the following advantages:
1、由于本装置通过触发器的输出电流变化来改变稳压限流器输入电流大小从而控制蓄电池的充电电流大小；当充电电流超过限定值时，电流将不在增大，而是稳定在限定值给蓄电池充电；满足蓄电池以小电流方式充电，减少蓄电池的伤害，延长蓄电池的使用寿命。1. Because the device changes the input current of the voltage stabilizer and current limiter through the change of the output current of the trigger to control the charging current of the battery; when the charging current exceeds the limit value, the current will not increase, but stabilize at the limit value Charge the battery; meet the requirements of charging the battery with a small current, reduce the damage of the battery, and prolong the service life of the battery.
2、由于本发明可以在负载突然加大时，蓄电池和DC/DC逆变电源一起给车载电器供电，在不发动汽车发动机时由蓄电池单独给车载电器供电的原因，满足汽车内大负荷用电器对电源的需求。2. Because the present invention can supply power to the on-board electrical appliances together with the battery and the DC/DC inverter power supply when the load suddenly increases, and the battery can supply power to the on-board electrical appliances alone when the car engine is not started, so as to meet the large-load electrical appliances in the car demand for power.
3、由于在蓄电池的侧壁上设有温度传感器和在蓄电池的充电电路上连接有电流传感器，根据蓄电池的当前温度和所需电流实时调整充电电流。3. Since a temperature sensor is provided on the side wall of the storage battery and a current sensor is connected to the charging circuit of the storage battery, the charging current is adjusted in real time according to the current temperature of the storage battery and the required current.
附图说明Description of drawings
图1是本发明的结构示意图；Fig. 1 is a structural representation of the present invention;
图2是稳压限流器为三极管的结构示意图；Fig. 2 is a structural schematic diagram of a triode as a regulator current limiter;
图3是稳压限流器为IGBT的结构示意图；Fig. 3 is a schematic diagram of the structure of the voltage regulator current limiter as an IGBT;
图4是稳压限流器为场效应管的结构示意图。Fig. 4 is a structural schematic diagram in which the voltage stabilizing current limiter is a field effect transistor.
图中，1、DC/DC逆变电源；2、续流二极管；3、稳压限流器；4、蓄电池；5、用电器；6、控制单元；61、触发器；62、温度传感器；63、电流传感器。In the figure, 1. DC/DC inverter power supply; 2. Freewheeling diode; 3. Regulator current limiter; 4. Battery; 5. Electrical appliance; 6. Control unit; 61. Trigger; 62. Temperature sensor; 63. Current sensor.
具体实施方式Detailed ways
以下是本发明的具体实施例，并结合附图对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。The following are specific embodiments of the present invention, and further describe the technical solution of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.
实施例一，如图1、2所示，本汽车低压电源充电装置包括汽车DC/DC逆变电源1和蓄电池4，汽车DC/DC逆变电源1的输出端对车载用电器5供电，汽车DC/DC逆变电源1的输出端还通过稳压限流器3对蓄电池4充电。在稳压限流器3的两端并联续流二极管2使蓄电池4对车载用电器5供电，续流二极管2的阳极与蓄电池4的正极连接，续流二极管2的阴极与汽车DC/DC逆变电源1连接。Embodiment 1, as shown in Figures 1 and 2, the automobile low-voltage power supply charging device includes an automobile DC/DC inverter power supply 1 and a storage battery 4, and the output terminal of the automobile DC/DC inverter power supply 1 supplies power to the vehicle-mounted electrical appliance 5, and the automobile The output terminal of the DC/DC inverter power supply 1 also charges the storage battery 4 through the voltage stabilizing current limiter 3 . The freewheeling diode 2 is connected in parallel at both ends of the voltage regulator current limiter 3 so that the battery 4 supplies power to the vehicle electrical appliance 5, the anode of the freewheeling diode 2 is connected to the positive pole of the battery 4, and the cathode of the freewheeling diode 2 is connected to the DC/DC inverter of the vehicle. Connect the variable power supply 1.
稳压限流器3与能够控制稳压限流器3导通或者截止的控制单元6连接。控制单元6包括触发器61、用于检测蓄电池4温度的温度传感器62和用于检测蓄电池4充电电流的电流传感器63。温度传感器62设置在蓄电池4的侧壁上，且温度传感器62的电源端与蓄电池4连接。电流传感器63设置在蓄电池4和稳压限流器3之间导线上，且电流传感器63的电源端与蓄电池4连接。温度传感器62的输出端和电流传感器63的输出端分别与触发器61的输入端连接。触发器61的输出端与稳压限流器3的输入端连接。稳压限流器3包括三极管，触发器61的输入端与三极管的基极B连接，三极管的集电极C与汽车DC/DC逆变电源1的输出端连接，三极管的发射极E与蓄电池4的正极连接。这里的触发器61为D触发器61或者JK触发器61。The voltage stabilizing current limiter 3 is connected with a control unit 6 capable of controlling the voltage stabilizing current limiter 3 to be turned on or off. The control unit 6 includes a trigger 61 , a temperature sensor 62 for detecting the temperature of the battery 4 and a current sensor 63 for detecting the charging current of the battery 4 . The temperature sensor 62 is arranged on the side wall of the battery 4 , and the power terminal of the temperature sensor 62 is connected to the battery 4 . The current sensor 63 is arranged on the wire between the battery 4 and the voltage regulator current limiter 3 , and the power supply end of the current sensor 63 is connected to the battery 4 . The output terminal of the temperature sensor 62 and the output terminal of the current sensor 63 are respectively connected to the input terminal of the trigger 61 . The output end of the flip-flop 61 is connected with the input end of the voltage regulator current limiter 3 . The stabilized current limiter 3 includes a triode, the input terminal of the trigger 61 is connected to the base B of the triode, the collector C of the triode is connected to the output terminal of the automobile DC/DC inverter power supply 1, and the emitter E of the triode is connected to the battery 4 positive connection. The flip-flop 61 here is a D flip-flop 61 or a JK flip-flop 61 .
本汽车低压电源充电装置的工作原理如下：The working principle of the car low-voltage power supply charging device is as follows:
在汽车运行时，由DC/DC逆变电源1给车载用电器5供电，同时DC/DC逆变电源1给蓄电池4充电，触发器61接收与之连接的温度传感器62和电流传感器63检测到的蓄电池4侧壁上的温度信号和充电电路上的电流信号，温度信号和电流信号分别启动触发器61并控制触发器61的输出电流大小，触发器61输出电流的大小给与之连接的三极管基极B，由三极管基极B电流的变化来控制三极管集电极C流向发射极E的电流。从而满足蓄电池4能够根据自身温度和所需电流进行充电，减少对蓄电池4的伤害。且当需要蓄电池4供电时，又可以通过反向并联在三极管集电极C和发射极E上的续流二极管2给车载用电器5供电。即满足了蓄电池4以小电流方式充电，同时又满足汽车内大负荷用电器5对电源的需求。When the car is running, the DC/DC inverter power supply 1 supplies power to the vehicle electrical appliances 5, and at the same time the DC/DC inverter power supply 1 charges the battery 4, and the trigger 61 receives the temperature sensor 62 and the current sensor 63 connected to it to detect The temperature signal on the side wall of the storage battery 4 and the current signal on the charging circuit, the temperature signal and the current signal respectively start the trigger 61 and control the output current of the trigger 61, and the output current of the trigger 61 is given to the triode connected to it Base B, the current flowing from the collector C of the triode to the emitter E is controlled by the change of the current of the base B of the triode. Therefore, the storage battery 4 can be charged according to its own temperature and required current, and the damage to the storage battery 4 can be reduced. And when the storage battery 4 is required to supply power, the freewheeling diode 2 connected in antiparallel to the collector C and emitter E of the triode can also be used to supply power to the vehicle electrical appliance 5 . That is, it satisfies the charging of the storage battery 4 with a small current, and at the same time satisfies the demand of the large-load electric appliance 5 in the automobile for the power supply.
由蓄电池4给电流传感器63供电，同时把电流传感器63的检测端串联在蓄电池4充电线路上，当充电电流穿过电流传感器63，电流传感器63就检测到所需的充电电流。电流传感器63检测蓄电池4的实际需求电流并输送给触发器61，触发器61内设置有限制最大充电电流，控制蓄电池4的充电电流范围可以更好的保护蓄电池4。当检测到的蓄电池4温度高于设定的极限温度，触发器61控制稳压限流器3暂停给蓄电池4充电。确保给蓄电池4充电电流在当前温度和所需电流的内部环境下是最适合的充电电流，且达到实时调整，减少对蓄电池4的伤害，延长蓄电池4的使用寿命。The current sensor 63 is powered by the storage battery 4, and the detection terminal of the current sensor 63 is connected in series with the charging circuit of the storage battery 4. When the charging current passes through the current sensor 63, the current sensor 63 detects the required charging current. The current sensor 63 detects the actual required current of the battery 4 and sends it to the trigger 61 . The trigger 61 is provided with a limit maximum charging current, and controlling the charging current range of the battery 4 can better protect the battery 4 . When the detected temperature of the battery 4 is higher than the set limit temperature, the trigger 61 controls the voltage regulator current limiter 3 to suspend charging the battery 4 . Ensure that the charging current for the battery 4 is the most suitable charging current under the internal environment of the current temperature and the required current, and achieve real-time adjustment to reduce damage to the battery 4 and prolong the service life of the battery 4 .
实施例二，如图1、图3所示，作为稳压限流器3的第二种方案，在汽车低压电源充电装置中，稳压限流器3包括IGBT，触发器61的输入端与IGBT的门极G连接，IGBT的集电极C与汽车DC/DC逆变电源1的输出端连接，IGBT的发射极E与蓄电池4的正极连接。其余连接结构同实施例一。触发器61控制向IGBT门极G施加电压，从而控制IGBT的集电极C和发射极E的导通和关断时间变化来控制输出电流大小，保证了DC/DC逆变电源给蓄电池进行充电的电流是蓄电池当前最适合的小电流。Embodiment 2, as shown in Fig. 1 and Fig. 3, as the second scheme of the voltage stabilizing current limiter 3, in the vehicle low-voltage power supply charging device, the stabilizing current limiting device 3 includes an IGBT, and the input terminal of the trigger 61 is connected to the The gate G of the IGBT is connected, the collector C of the IGBT is connected to the output terminal of the DC/DC inverter power supply 1 of the vehicle, and the emitter E of the IGBT is connected to the positive pole of the storage battery 4 . All the other connection structures are the same as in Embodiment 1. The trigger 61 controls the voltage applied to the gate G of the IGBT, thereby controlling the change of the turn-on and turn-off time of the collector C and the emitter E of the IGBT to control the output current, ensuring that the DC/DC inverter power supply can charge the battery The current is the most suitable small current for the battery.
实施例三，如图1、图4所示，上述的稳压限流器3内的三极管由场效应管代替，本实施例举例场效应管中的MOS管，所述MOS管的源极S通过导线与汽车DC/DC逆变电源1连接，MOS管的栅极G与触发器61的输出端相连接，MOS管的漏极D连接蓄电池4，且MOS管的源极S和漏极D之间反向连接有续流二极管2，其余连接结构同实施例一。触发器61根据温度传感器62和电流传感器63的检测信号作为触发信号，输出控制电流来改变MOS管栅极G电流，也就改变了栅源极之间的电压，从而改变输出给蓄电池4的电流，MOS管是电压控制电流式器件。且MOS管的源极S和漏极D绝缘不导通，在MOS管的源极S和漏极D之间反向并联有续流二极管2，使得蓄电池4在汽车DC/DC逆变电源1不供电或负载突然增大时蓄电池4的电流通过二极管正向导通给车载用电器5供电。Embodiment 3, as shown in Fig. 1 and Fig. 4, the triode in the above-mentioned stabilized current limiter 3 is replaced by a field effect transistor. Connect with the automobile DC/DC inverter power supply 1 through wires, the gate G of the MOS transistor is connected with the output end of the flip-flop 61, the drain D of the MOS transistor is connected with the storage battery 4, and the source S and drain D of the MOS transistor Freewheeling diodes 2 are reversely connected between them, and the other connection structures are the same as those in Embodiment 1. The trigger 61 uses the detection signals of the temperature sensor 62 and the current sensor 63 as a trigger signal to output a control current to change the current of the gate G of the MOS transistor, which also changes the voltage between the gate and the source, thereby changing the current output to the battery 4 , MOS tube is a voltage-controlled current device. And the source S and the drain D of the MOS tube are insulated and non-conductive, and a freewheeling diode 2 is connected in reverse parallel between the source S and the drain D of the MOS tube, so that the battery 4 is used in the DC/DC inverter power supply 1 of the car. When there is no power supply or when the load suddenly increases, the current of the storage battery 4 supplies power to the vehicle electrical appliance 5 through forward conduction through the diode.
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.
尽管本文较多地使用了DC/DC逆变电源1、续流二极管2、稳压限流器3、蓄电池4、用电器5、控制单元6、触发器61、温度传感器62、电流传感器63等术语，但并不排除使用其它术语的可能性。使用这些术语仅仅是为了更方便地描述和解释本发明的本质；把它们解释成任何一种附加的限制都是与本发明精神相违背的。Although this article uses more DC/DC inverter power supply 1, freewheeling diode 2, voltage regulator current limiter 3, battery 4, electrical appliance 5, control unit 6, trigger 61, temperature sensor 62, current sensor 63, etc. term, but does not exclude the possibility of using other terms. These terms are used only for the purpose of describing and explaining the essence of the present invention more conveniently; interpreting them as any kind of additional limitation is against the spirit of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210065682.5ACN102611157B (en) | 2012-01-13 | 2012-01-13 | Automobile low-voltage power supply charging device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210065682.5ACN102611157B (en) | 2012-01-13 | 2012-01-13 | Automobile low-voltage power supply charging device |
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| CN102611157A CN102611157A (en) | 2012-07-25 |
| CN102611157Btrue CN102611157B (en) | 2014-08-06 |
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| CN201210065682.5AExpired - Fee RelatedCN102611157B (en) | 2012-01-13 | 2012-01-13 | Automobile low-voltage power supply charging device |
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| CN103825255A (en)* | 2014-03-19 | 2014-05-28 | 航天科技控股集团股份有限公司 | Standby battery charging and discharging protection circuit for car-mounted terminal equipment |
| CN114285140A (en)* | 2021-12-17 | 2022-04-05 | 无锡市佳力创科技有限公司 | A control system and method for power supply and battery charging of vehicle electrical appliances |
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| JP2006266087A (en)* | 2005-03-22 | 2006-10-05 | Mikuni Corp | Power supply control device and power supply control method for vehicle |
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8022661B1 (en)* | 2008-04-28 | 2011-09-20 | Lockheed Martin Corporation | Battery over-discharge protection with dead-bus recovery |
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