CN203840038U - Multifunctional integrated on-board charger based on full-control device - Google Patents

Abstract

The utility model provides a multifunctional integrated vehicle charger based on full-controlled devices, comprising a front filtering module, a first rectification module, a power factor correction (PFC) module, a first filtering module, an inversion module, a transformer, a second rectification module and a third filtering module. The transformer at least comprises an original primary winding loop, a first secondary winding loop and a second secondary winding loop. The inversion module is in connection with the original primary winding loop; the second rectification module is in connection with the second secondary winding loop. The multifunctional integrated vehicle charger also comprises a rectification inversion module and a second filtering module successively connected to the first secondary winding loop. The inversion module, the rectification inversion module and the second rectification module all comprise full-controlled devices. The multifunctional integrated vehicle charger based on full-controlled devices realizes functions of an AC-DC charger and a DC converter, reduces vehicle charger cost, weight and size, realizes electrical isolation and has high energy conversion efficiency.

Description

Multifunctional integrated on-board charger based on full-control device

technical field

The utility model belongs to the technical field of electric vehicle charging and relates to a vehicle-mounted charger.

Background technique

Environmental and energy issues are becoming more and more prominent in today's world. Electric vehicles have become a hot spot in the research and development of the automobile industry. However, the marketization of electric vehicles is still hindered by some key technologies. Among them, one of the more prominent technologies is the charging technology of electric vehicles.

Electric vehicle chargers are an important part of electric vehicles. At present, electric vehicle chargers can be divided into off-board chargers and on-board chargers. For electric vehicles, the role of the traditional on-board charger is to charge the high-voltage power battery with the alternating current of the public grid. The traditional on-board charger includes the following parts: electromagnetic interference (EMI) filter, input rectification module, power factor correction (PFC) module, input filter, inverter module, transformer, output rectification module, output filter; the inverter The module, the transformer, the output rectification module, and the output filter constitute a DC-DC conversion unit, which realizes the DC-DC conversion function. The vehicle-mounted DC converter (DCDC) is used for high-voltage power batteries to charge low-voltage batteries. The functions of the DC-DC converter and the DC-DC conversion unit in the vehicle charger are similar, but the two are generally separated, that is, for The charging of the high-voltage power battery by the public grid and the charging of the low-voltage battery by the high-voltage power battery include two DCDC devices in principle, so the cost of the on-board charger is high, the volume is large and the function is single.

Utility model content

The purpose of the utility model is to provide an on-board charger which can not only use the AC power of the public grid to charge the high-voltage power battery and the low-voltage storage battery when the vehicle is required to be charged, but also use the high-voltage power battery to charge the low-voltage storage battery when the vehicle is running.

In order to achieve the above object, the solution of the present utility model is:

A multi-functional integrated electric vehicle on-board charger based on a full-control device, including a front-end filter module, a first rectifier module, a power factor correction module, a first filter module, an inverter module, a transformer, a second rectifier module and a second rectifier module. Three filter modules; the transformer includes at least one primary winding coil and two secondary winding coils, a first secondary winding coil and a second secondary winding coil, the inverter module is connected to the primary winding coil, the The second rectifier module is connected to the second secondary winding coil, and the third filter module is connected to the battery of the vehicle; the on-board charger also includes a rectification and inverter module sequentially connected to the first secondary winding coil And a third filter module, the third filter module is connected to the power battery of the vehicle; the inverter module, the rectifier inverter module and the second rectifier module all include full-control devices.

The front-end filtering module is a front-end filter.

The front-end filter is an electromagnetic interference filter.

The first filtering module is a first filter.

The second filtering module is a second filter.

The third filtering module is a third filter.

The inverter module adopts a full-bridge topology composed of four power metal-oxide layer-semiconductor-field effect transistors.

The rectification and inverter module adopts a full-bridge topology composed of four power metal-oxide layer-semiconductor-field effect transistors.

The second rectifier module adopts a full-bridge topology composed of four power metal-oxide layer-semiconductor-field effect transistors.

The on-board charger further includes a switch, the switch is connected to the front-end filter module and the public power grid, and serves as an interface between the on-board charger and the public power grid.

Due to the adoption of the above scheme, the beneficial effects of the utility model are: the utility model is based on the multi-functional integrated electric vehicle on-board charger of a fully-controlled device, which expands the function of the on-board charger, and can realize the function of the AC and DC charger. The public power grid charges the high-voltage power battery and the low-voltage battery; it can also realize the function of a DC converter, and the high-voltage power battery charges the low-voltage battery. Therefore, the utility model also reduces the cost of the on-board charger, and reduces the weight and volume. In addition, the utility model realizes electrical isolation and has high energy conversion efficiency.

Description of drawings

Fig. 1 is the composition schematic diagram of the on-board charger in the utility model embodiment;

Fig. 2 is an energy flow diagram when the vehicle-mounted charger realizes the function of an AC/DC charger in an embodiment of the utility model;

Fig. 3 is an energy flow diagram when the on-board charger realizes the function of a DC converter in the embodiment of the utility model.

In the drawings: 1. switch; 2. transformer; 21. primary winding coil; 2201. first secondary winding coil; 2202. second secondary winding coil.

Detailed ways

Below in conjunction with the embodiment shown in the accompanying drawings the utility model is further described.

The utility model proposes a multi-functional integrated vehicle charger based on a full-control device, and Fig. 1 is a schematic diagram of its composition. The charger includes a switch 1 connected in sequence, an EMI filter, a first rectifier module, a PFC module, a first filter, an inverter module, a transformer 2 with one winding coil on the primary side and two winding coils on the secondary side, rectifier/ Inversion module and the second filter; Wherein, the inverter module is connected to the primary winding coil 21 of the transformer 2, and the rectification/inversion module is connected to the first secondary winding coil 2201 of the transformer 2; the second filter is connected to the High voltage power battery.

The on-board charger also includes a second rectifier module and a third filter sequentially connected to the second secondary winding coil 2202 of the transformer 2, and the third filter is connected to the low-voltage battery of the vehicle where it is located.

Among them, the switch 1 is the interface between the on-board charger and the public power grid; the EMI filter is used to filter out the higher harmonics from the public power grid; the first rectifier module is used to rectify the alternating current of the public power grid into pulsating direct current; the PFC module is used for Improve the power factor and reduce the harmonics of the on-board charger input to the public grid; the first filter is used to filter out the pulsating components in the direct current output by the PFC module; the inverter module is used to invert the direct current output by the first filter into alternating current; the transformer 2 is used to realize voltage transformation and energy transmission; the rectification/inverter module is used to rectify the AC power output by the first secondary winding 2201 of the transformer 2 into DC power, or invert the DC power output by the high-voltage power battery into AC power; the second filtering The filter is used to filter out the pulsating components in the direct current output by the rectification/inversion module; the second rectification module is used to rectify the alternating current output by the second secondary winding coil 2202 of the transformer 2 into direct current; the third filter is used to filter out the second The pulsating component in the direct current output from the rectifier module. The high-voltage power battery is the power source of the electric vehicle, and the low-voltage battery is the 12V battery on the electric vehicle.

In the on-board charger, the inverter module, the rectification/inversion module and the second rectification module all include full-control devices. Specifically, the inverter module adopts a full-bridge topology composed of four power metal-oxide layer-semiconductor-field effect transistors (MOSFETs). The rectification/inversion module adopts a full-bridge topology composed of 4 power MOSFETs and has the function of synchronous rectification. The second rectification module adopts a full-bridge topology composed of four power MOSFETs, and has the function of synchronous rectification.

Since the rectifier/inverter module has a synchronous rectification function, the multifunctional integrated electric vehicle on-board charger based on a fully-controlled device can realize the function of an AC/DC charger when on-board charging is required, and the rectifier/inverter module is in rectification mode; The multi-functional integrated electric vehicle on-board charger based on a fully-controlled device realizes the function of a DC converter when the vehicle is running, and the rectifier/inverter module is in the inverter mode.

Figure 2 shows the energy flow diagram when the multi-functional integrated electric vehicle on-board charger based on full-control devices realizes the function of AC and DC chargers, and the direction of the arrow in Figure 2 indicates the direction of energy flow. The energy of the public power grid flows to the primary side of the transformer 2 through the EMI filter, the first rectifier module, the PFC module, the first filter, and the inverter module in sequence, and the energy flowing to the transformer 2 is output from the two winding coils on the secondary side, and from the second The energy output by a secondary winding coil 2201 flows to the high-voltage power battery through the rectification/inverting module and the second filter, and the energy output from the second secondary winding coil 2202 flows to the low-voltage 12 volts through the second rectifying module and the third filter The storage battery, so as to realize the simultaneous charging of the high-voltage power battery and the low-voltage 12-volt battery by using the alternating current of the public grid. At this time, the rectification/inversion module realizes the rectification function.

Figure 3 shows the energy flow diagram when the multi-functional integrated electric vehicle on-board charger based on the full-control device realizes the function of the DC converter, and the direction of the arrow in Figure 3 indicates the direction of energy flow. The energy output by the high-voltage power battery flows from the first secondary winding coil 2201 of the transformer 2 to the transformer 2 through the second filter and the rectification/inversion module. The energy of 2 flows out from the second secondary winding coil 2202 of the transformer, and flows to the low-voltage 12-volt battery through the second rectifier module and the third filter, thereby realizing DC voltage conversion from the high-voltage power battery to the low-voltage 12-volt battery. At this time, the rectification/inversion module realizes the inverter function.

In summary, the utility model based on the multi-functional integrated electric vehicle on-board charger of the full-control device expands the functions of the on-board charger, and can realize the function of the AC and DC charger. Charging the low-voltage 12-volt battery; it can also realize the function of a DC converter, charging the low-voltage 12-volt battery from the high-voltage power battery. Therefore, the utility model also reduces the cost of the on-board charger, and reduces the weight and volume. In addition, the utility model realizes electrical isolation and has high energy conversion efficiency.

The above description of the embodiments is for those of ordinary skill in the technical field to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative effort. Therefore, the utility model is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the utility model without departing from the category of the utility model should be within the protection scope of the utility model.

Claims (10)

1. A multi-functional integrated on-board charger based on a full-control device, including a front-end filter module, a first rectifier module, a power factor correction module, a first filter module, an inverter module, a transformer, a second rectifier module and a second rectifier module Three filter modules, characterized in that: the transformer includes at least one primary winding coil and two secondary winding coils, a first secondary winding coil and a second secondary winding coil, and the inverter module is connected to the primary winding coil, the second rectifier module is connected to the second secondary winding coil, and the third filter module is connected to the storage battery of the vehicle; the on-board charger also includes a A rectification inverter module and a second filter module, the second filter module is connected to the power battery of the vehicle; The inverter module, the rectification inverter module and the second rectification module all include full-control devices. the 2. The multifunctional integrated on-board charger based on a full-control device according to claim 1, wherein the front-end filter module is a front-end filter. the 3. The multifunctional integrated on-board charger based on a full-control device according to claim 2, wherein the front-end filter is an electromagnetic interference filter. the 4. The multifunctional integrated on-board charger based on a full-control device according to claim 1, wherein the first filter module is a first filter. the 5. The multifunctional integrated vehicle charger based on a full-control device according to claim 1, wherein the second filter module is a second filter. the 6. The multifunctional integrated vehicle charger based on a full-control device according to claim 1, wherein the third filter module is a third filter. the 7. The multifunctional integrated on-board charger based on a full-control device according to claim 1, characterized in that: the inverter module adopts a full-fledged battery consisting of four power metal-oxide layer-semiconductor-field effect transistors. bridge topology. the 8. The multifunctional integrated on-board charger based on a full-control device according to claim 1, characterized in that: the rectification and inverter module is composed of four power metal-oxide layer-semiconductor-field effect transistors Full bridge topology. the 9. The multi-functional integrated on-board charger based on a fully-controlled device according to claim 1, wherein the second rectifier module is composed of four power metal-oxide layer-semiconductor-field-effect transistors. Full bridge topology. the 10. The multifunctional integrated on-board charger based on a full-control device according to claim 1, characterized in that: the on-board charger also includes a switch, and the switch is connected to the front-end filter module and the public power grid as a The interface between the on-board charger and the public power grid. the