Generator charger

Abstract

The generator charger comprises a DC buck-boost module, a voltage acquisition module, a current acquisition module and a main control module. The input end of the direct-current buck-boost module is connected with the output end of the rectifier module; the output end of the direct-current buck-boost module is connected with the battery; the control end of the direct-current buck-boost module is connected with the first input end of the main control module; the second input end of the main control module is connected with the output end of the voltage acquisition module; the first input end of the voltage acquisition module is connected with the input end of the direct current buck-boost module, and the second input end of the voltage acquisition module is connected with the output end of the direct current buck-boost module; the third input end of the main control module is connected with the output end of the current acquisition module; and the input end of the current acquisition module is connected to a current sensor between the output end of the rectifier module and the battery. The charger is better compatible with charging of different types of batteries, and the utilization rate of a generator charger is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of generator, especially the field of generator charging. BACKGROUND

[0002] At present, in the field of generator, there are two ways to charge the battery by using the generator; the first is to convert the three-phase alternating current generated by the generator into 220VAC single-phase alternating current, and then charge the battery through the external corresponding charger; the second is to adjust the speed of the engine in the generator to adjust the generator AC voltage to rectify the DC to charge the battery. In the first charging method, different chargers are needed to charge different battery types, different battery voltages and different battery capacities, and the conventional charger has poor compatibility, which increases the cost for the user. In the second charging method, the output voltage is adjusted by adjusting the speed, which has low voltage adjustment accuracy and affects the charging effect, and the battery with higher voltage than the generator cannot be charged. SUMMARY

[0003] In order to solve the problem that the existing generator charger cannot charge different batteries and the utilization rate of the generator charger is low, the utility model provides a generator charger.

[0004] In order to solve the above problems, the utility model adopts the following technical scheme:

[0005] A generator charger comprises a DC boost-buck module, a voltage acquisition module, a current acquisition module and a main control module; the input end of the DC boost-buck module is connected with the output end of a rectifier module; the output end of the DC boost-buck module is connected with a battery; the control end of the DC boost-buck module is connected with the first input end of the main control module; the second input end of the main control module is connected with the output end of the voltage acquisition module; the first input end of the voltage acquisition module is connected with the input end of the DC boost-buck module, and the second input end of the voltage acquisition module is connected with the output end of the DC boost-buck module; the third input end of the main control module is connected with the output end of the current acquisition module; and the input end of the current acquisition module is connected with a current sensor between the output end of the rectifier module and the battery.

[0006] Further, the DC boost and buck module comprises MOS tube module Q7, MOS tube module Q8, MOS tube module Q9, MOS tube module Q10 and inductor L2; one end of the inductor L2 is connected with the source of the MOS tube module Q7 and the drain of the MOS tube module Q8; the other end of the inductor L2 is connected with the source of the MOS tube module Q9 and the drain of the MOS tube module Q10; the source of the MOS tube module Q8 and the source of the MOS tube module Q10 are connected with the negative electrode of the battery; the drain of the MOS tube module Q7 is connected with the positive electrode of the output end of the rectifier module; and the drain of the MOS tube module Q10 is connected with the positive electrode of the battery.

[0007] Further, the input end of the DC boost and buck module is connected with the first filter in parallel; and the output end of the DC boost and buck module is connected with the second filter in parallel.

[0008] Further, at least one current sensor is arranged in the circuit from the rectifier module to the battery.

[0009] Further, the fourth input end of the main control module is connected with the output end of the wireless communication module.

[0010] The utility model discloses a DC boost and buck module, rectifier module, main control module, wireless communication module and battery charging circuit. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is the schematic diagram of the embodiment of the utility model. DETAILED DESCRIPTION

[0012] The technical means, creative features, purposes and effects of the utility model are easy to understand; in the description of the utility model, it is to be understood that the directions or position relations of the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated having a specific direction, being constructed and operated in a specific direction, and therefore cannot be understood as limiting the utility model. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0013] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0014] Please refer to Figure 1 The utility model provides a generator charger, including DC boost and buck module 103, voltage acquisition module 107, current acquisition module 106, main control module 108, the input of DC boost and buck module 103 is connected the output of rectifier module 101, the output of DC boost and buck module 103 is connected battery, the control end of DC boost and buck module 103 is connected the first input of main control module 108, the second input of main control module 108 is connected voltage acquisition module 107 output, the first input of voltage acquisition module 107 is connected the input of DC boost and buck module 103, the second input of voltage acquisition module 107 is connected the output of DC boost and buck module 103, the third input of main control module 107 is connected current acquisition module 106 output, the input of current acquisition module 106 is connected to the current sensor 105 between rectifier module 101 output to battery.

[0015] In the embodiment, the DC boost-buck module comprises MOS module Q7, MOS module Q8, MOS module Q9, MOS module Q10 and inductor L2; one end of the inductor L2 is connected with the source of MOS module Q7 and the drain of MOS module Q8; the other end of the inductor L2 is connected with the source of MOS module Q9 and the drain of MOS module Q10; the source of MOS module Q8 and the source of MOS module Q10 are connected with the negative electrode of the battery; the drain of MOS module Q7 is connected with the positive electrode of the output end of the rectifier module; and the drain of MOS module Q10 is connected with the positive electrode of the battery.

[0016] In the embodiment, the first input and output end of the DC boost-buck module 103 is connected in parallel with the first filter 102; and the second input and output end of the DC boost-buck module 103 is connected in parallel with the second filter 104.

[0017] In the embodiment, the rectifier module 101 is provided with a current sensor 105 in the battery circuit.

[0018] In the embodiment, the fourth input end of the main control module 108 is connected with the output end of the wireless communication module 110.

[0019] Compared with the prior art, the dedicated battery charger usually uses the transformer ratio to change the increase or decrease of the output voltage, but the transformer has a large volume, and once the transformer ratio is determined, the output voltage range is fixed and the charging voltage cannot be adjusted in a large range. In the embodiment, the boost-buck circuit can reduce the input voltage to charge the battery or can boost the voltage to charge the battery, thus avoiding the defects of the transformer conversion voltage of the traditional charger.

[0020] As a specific embodiment, please refer to Figure 1 It should be noted that in the embodiment, the current collection module 106 and the voltage collection module 107 adopt an operational amplifier differential detection circuit, the wireless communication module 110 is a Bluetooth wireless transceiver module, and the auxiliary power module 109 and the main control module 108 are both known technologies, so they are not listed one by one in the embodiment, and the related working principles involved are not described here.

[0021] The working process of the specific embodiment will be further described below.

[0022] The generator auxiliary winding provides an input source for the auxiliary power module 109, which provides appropriate power supply voltage for each module; the voltage acquisition module 107 acquires the voltage at the input end and the output end of the DC boost-buck module 103 and transmits the sampled voltage signal to the main control module 108; the current sensor module 106 acquires the current signal of the current sensor 105 and transmits it to the main control module 108; the wireless communication module 110 receives the user's setting signal of the charger parameters and transmits it to the main control module 108; when charging the battery, the three-phase alternating voltage generated by the generator 100 is rectified into direct current voltage by the rectifier module 101, and is filtered into smooth direct current voltage by the first filter 102, and the filtered direct current voltage is input to the input end of the DC boost-buck module 103; when the main control module 108 detects that the voltage at the input end of the DC boost-buck module 103 is greater than the battery charging voltage, the main control module 108 configures the DC boost-buck module 103 into a buck mode, that is, opens the MOS tube module Q9, closes the MOS tube module Q10, and outputs a set of complementary PWM signals to drive the MOS tube module Q7 and the MOS tube module Q8; the MOS tube module Q7, the MOS tube module Q8 and the inductor L2 form a standard BUCK buck circuit, and the main control module 108 adjusts the duty cycle of the PWM through the voltage and current signals to adjust the charging voltage and charging current, which are filtered by the second filter 104 and then used to charge the battery; when the main control module 108 detects that the voltage at the input end of the DC boost-buck module 103 is less than the battery charging voltage, the main control module 108 configures the DC boost-buck module 103 into a boost mode, that is, opens the MOS tube module Q7, closes the MOS tube module Q8, and outputs a set of complementary PWM signals to drive the MOS tube module Q9 and the MOS tube module Q10; the MOS tube module Q9, the MOS tube module Q10 and the inductor L2 form a standard BOOST boost circuit, and the main control module 108 adjusts the duty cycle of the PWM through the voltage and current signals to adjust the charging voltage and charging current, which are filtered by the second filter 104 and then used to charge the battery; when the main control module 108 detects that the voltage at the input end of the DC boost-buck module 103 is equal to the battery charging voltage, the main control module 108 opens the MOS tube module Q7 and the MOS tube module Q9, closes the MOS tube module Q8 and the MOS tube module Q10, and directly filters the second filter 104 to charge the battery.

[0023] The above describes the preferred embodiments of the present application. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A generator charger characterized by: The direct current step-up and step-down module, the voltage acquisition module, the current acquisition module, and the main control module are included; the input end of the direct current step-up and step-down module is connected with the output end of the rectifier module; the output end of the direct current step-up and step-down module is connected with the battery; the control end of the direct current step-up and step-down module is connected with the first input end of the main control module; the second input end of the main control module is connected with the output end of the voltage acquisition module; the first input end of the voltage acquisition module is connected with the input end of the direct current step-up and step-down module, and the second input end of the voltage acquisition module is connected with the output end of the direct current step-up and step-down module; the third input end of the main control module is connected with the output end of the current acquisition module; the input end of the current acquisition module is connected with the current sensor between the output end of the rectifier module and the battery.

2. A generator-charger according to claim 1, wherein: The direct current step-up and step-down module includes MOS tube module Q7, MOS tube module Q8, MOS tube module Q9, MOS tube module Q10, and inductor L2; one end of the inductor L2 is connected with the source of the MOS tube module Q7 and the drain of the MOS tube module Q8; the other end of the inductor L2 is connected with the source of the MOS tube module Q9 and the drain of the MOS tube module Q10; the source of the MOS tube module Q8 and the source of the MOS tube module Q10 are connected with the negative electrode of the battery; the drain of the MOS tube module Q7 is connected with the positive electrode of the output end of the rectifier module; and the drain of the MOS tube module Q10 is connected with the positive electrode of the battery.

3. A generator-charger according to claim 1, wherein: The input end of the direct current step-up and step-down module is connected in parallel with the first filter; and the output end of the direct current step-up and step-down module is connected in parallel with the second filter.

4. A generator-charger according to claim 1, wherein: At least one current sensor is arranged in the rectifier module to battery circuit.

5. A generator-charger according to claim 1, wherein: The fourth input end of the main control module is connected with the output end of the wireless communication module.

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