WO2020191682A1 - Vehicle-mounted battery charger and manufacturing method therefor, vehicle-mounted battery charger system - Google Patents

Abstract

The present application discloses a vehicle-mounted battery charger and a manufacturing method therefor as well as a vehicle-mounted battery charger system, comprising a control circuit, an alternating current charging processing circuit and a charging switch protection circuit. The control circuit is connected with the alternating current charging processing circuit and the charging switch protection circuit, and the alternating current charging processing circuit is connected with the charging switch protection circuit. According to the embodiment of the present application, the direct current charging function and the alternating current charging function are integrated in a vehicle-mounted battery charger so as to make the vehicle-mounted battery charger a control and switching center for the battery and external energy, thereby liberating the battery management system (BMS) and optimizing the local network structure and direct current power path of the vehicle control unit.

Description

Vehicle-mounted charger and manufacturing method, vehicle-mounted charger system Technical field

This application relates to the field of electric vehicle charging technology, and in particular to a vehicle-mounted charger, a manufacturing method, and a vehicle-mounted charger system.

Background technique

In recent years, in order to protect the environment and reduce the use of non-renewable resources, new energy sources have been gradually introduced in automobile manufacturing and application fields. Electric vehicles are the main force of new energy vehicles. Electric vehicles are divided into pure electric vehicles, hybrid vehicles and fuel cell vehicles. As new energy vehicles gradually become an important development direction of the future automotive industry, on-board electronic devices (such as DC/DC converters and integrated on-board chargers) are becoming smaller, more integrated, and highly power-intensive. At present, the integrated on-board charger circuit has realized the function of charging the power battery pack or accumulator through the mains, but this function is relatively single, and it is difficult to meet the diversified use requirements of the integrated charger in future scenarios.

Summary of the invention

The embodiments of the application provide a vehicle-mounted charger, a manufacturing method, and a vehicle-mounted charger system. The vehicle-mounted charger system and the vehicle-mounted charger integrate the DC charging function and the AC charging function, so that the vehicle-mounted charger becomes a battery and external energy control and The conversion center liberated the battery management system BMS and optimized the vehicle controller area network structure and DC power route.

The first aspect of the embodiments of the present application provides a vehicle-mounted charger, including a control circuit, an AC charging processing circuit, and a charging switch protection circuit. The control circuit is connected to the AC charging processing circuit and the charging switch protection circuit. The charging processing circuit is connected to the charging switch protection circuit;

The control circuit is used to connect the battery management system BMS and the vehicle controller; the AC charging processing circuit is used to connect the AC charging pile, the high voltage battery and the low voltage battery, and the charging switch protection circuit is used to connect the DC charging pile, the high voltage Batteries and low-voltage batteries; the charging switch protection circuit supports DC fast charging mode and DC slow charging mode;

When the charging switch protection circuit supports the DC fast charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery. The low-voltage battery;

When the charging switch protection circuit supports the DC slow charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery.述low-voltage battery.

In one embodiment, the charging switch protection circuit includes a first relay and a second relay; the control circuit connects the first relay and the second relay, and the first relay and the second relay are connected in parallel Connecting a DC charging input port and a charging output port of the on-board charger, the DC charging input port is used for connecting a DC charging pile, and the charging output port is used for connecting the high voltage battery;

The control circuit is also connected to the DC charging input port to identify a charging mode of the DC charging connected to the DC charging input port, the charging mode including the DC fast charging mode and the DC slow charging mode;

The charging output port is also connected to the AC charging processing circuit to transmit the DC current obtained by the AC charging processing circuit to the high-voltage battery.

In an embodiment, the charging switch protection circuit further includes a first fuse device, a second fuse device, and a filter circuit; the first relay is connected to the input end of the filter circuit through the first fuse device; The second relay is connected to the input terminal of the filter circuit through the second insurance device; the output terminal of the filter circuit is connected to the charging output port;

The input terminal of the filter circuit is also used to connect to the AC charging processing circuit, so that the AC charging processing circuit is connected to the charging output port through the filter circuit.

In one embodiment, the filter circuit includes a first filter circuit, a second filter circuit, and a selection control module; the selection control module is connected to the first insurance device, the second insurance device, and the AC charging process The selection control module is also connected to the input terminal of the first filter circuit and the input terminal of the second filter circuit, and the output terminal of the first filter circuit and the output terminal of the second filter circuit are connected to the The charging output port.

In one embodiment, the AC charging processing circuit includes a first micro control unit, a second micro control unit, a third micro control unit, a rectification processing circuit, a first DC/DC circuit, a second DC/DC circuit, and a low voltage Interface circuit; the first micro-control unit is connected to the second micro-control unit, the third micro-control unit and the rectification processing circuit; the rectification processing circuit is connected to the first DC/DC circuit and can be connected with The AC charging pile is connected; the first DC/DC circuit is connected to the high-voltage battery, the second micro-control unit and the second DC/DC circuit; the second micro-control unit MCU is connected to the high-voltage Battery; the second DC/DC circuit is connected to the third micro-control unit and the low-voltage battery, and the third micro-control unit is connected to the low-voltage interface circuit.

In an embodiment, the rectification processing circuit includes a first diode, a second diode, a third diode, and a fourth diode, and the anode of the first diode is connected to the third diode. The cathode of the diode, the anode of the first diode and the cathode of the third diode have the first input terminal of the rectifier module, and the anode of the second diode is connected to the The cathode of the fourth diode, the second input terminal of the rectifier module is provided between the anode of the second diode and the cathode of the fourth diode, and the cathode of the first diode is connected to The cathodes of the second diode are connected together and output to the DC bus, and the anode of the third diode is connected to the anode of the fourth diode and connected to the ground.

In one embodiment, the on-board charger further includes a charge-discharge and power conversion assembly; the input end of the charge-discharge and power conversion assembly is connected to the AC charging processing circuit, the charging switch protection circuit, and the The low-voltage battery and the high-voltage battery; the output end of the charge-discharge and power conversion assembly is connected to a fan, an air conditioner, a thermistor PTC and a motor.

The second aspect of the embodiments of the present application provides a vehicle-mounted charger system, including the above-mentioned vehicle-mounted charger.

The on-board charging system includes a vehicle controller, a battery management system BMS, a high-voltage battery, an on-board charger, and a low-voltage battery;

The vehicle controller is connected to the vehicle charger, the battery management system BMS is connected to the vehicle charger, the high voltage battery is connected to the vehicle charger, the vehicle charger is connected to the low voltage battery, the The on-board charger is also used to connect an external DC charging pile and an external AC charging pile.

In one embodiment, the vehicle charger includes a control circuit, an AC charging processing circuit, and a charging switch protection circuit, the control circuit is connected to the AC charging processing circuit and the charging switch protection circuit, and the AC charging processing circuit Connect the charging switch protection circuit;

The control circuit is connected to the battery management system BMS and the vehicle controller; the AC charging processing circuit is connected to the high voltage battery and the low voltage battery, and to an AC charging pile; the charging switch protection circuit is connected to the high voltage The battery and the low-voltage battery are used to connect to a DC charging pile; the charging switch protection circuit supports a DC fast charging mode and a DC slow charging mode.

When the charging switch protection circuit supports the DC fast charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery. The low-voltage battery;

When the charging switch protection circuit supports the DC slow charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery.述low-voltage battery.

In one embodiment, the charging switch protection circuit includes a first relay and a second relay; the control circuit connects the first relay and the second relay, and the first relay and the second relay are connected in parallel Connecting a DC charging input port and a charging output port of the on-board charger, the DC charging input port is used to connect to a DC charging pile, and the DC charging output port is connected to the high-voltage battery;

The control circuit is also connected to the DC charging input port to identify a charging mode of the DC charging connected to the DC charging input port, the charging mode including the DC fast charging mode and the DC slow charging mode;

The charging output port is also connected to the AC charging processing circuit to transmit the DC current obtained by the AC charging processing circuit to the high-voltage battery.

The third aspect of the embodiments of the present application provides a manufacturing method of a vehicle-mounted charger, which is applied to a vehicle-mounted charger including a control circuit, an AC charging processing circuit, and a charging switch protection circuit, wherein:

Connecting the control circuit to the AC charging processing circuit and the charging switch protection circuit;

Connecting the AC charging processing circuit to the charging switch protection circuit;

The control circuit is used to connect the battery management system BMS and the vehicle controller; the AC charging processing circuit is used to connect the AC charging pile, the high voltage battery and the low voltage battery, and the charging switch protection circuit is used to connect the DC charging pile, the high voltage Batteries and low-voltage batteries; the charging switch protection circuit supports DC fast charging mode and DC slow charging mode;

When the charging switch protection circuit supports the DC fast charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery. The low-voltage battery;

When the charging switch protection circuit supports the DC slow charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery.述low-voltage battery.

The implementation of the embodiments of this application has the following beneficial effects:

In the present application, the vehicle-mounted charger includes a control circuit, an AC charging processing circuit, and a charging switch protection circuit, the control circuit is connected to the AC charging processing circuit and the charging switch protection circuit, and the AC charging processing circuit is connected to the The charging switch protection circuit; the control circuit is used to connect the battery management system BMS and the vehicle controller; the AC charging processing circuit is used to connect the AC charging pile, the high-voltage battery and the low-voltage battery, and the charging switch protection circuit is used to connect DC charging pile, high-voltage battery and low-voltage battery; the charging switch protection circuit supports DC fast charging mode and DC slow charging mode; when the charging switch protection circuit supports the DC fast charging mode, the charging switch protection circuit is connected The DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the low-voltage battery; when the charging switch protection circuit supports the DC slow charging mode, the charging A switch protection circuit connects the DC charging pile and the high-voltage battery, or the charging switch protection circuit connects the DC charging pile and the low-voltage battery. It can be seen that this application expands the detection and control functions of the charger, so that in addition to the AC slow charging function, it can also control DC fast charging, eliminating the process of interaction between the DC charging pile and the battery management system BMS, thereby liberating the battery The function of the management system BMS optimizes the vehicle controller area network and DC power lines. It solves the problem that the traditional integrated on-board charger has a single function and it is difficult to meet the diversified use requirements of the integrated on-board charger in future scenarios.

These and other aspects of the application will be more concise and understandable in the description of the following embodiments.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the application or the background art, the following will briefly introduce the drawings involved in the embodiments of the application or the background art.

The following will briefly introduce the drawings involved in the embodiments of the present application.

FIG. 1 is a schematic diagram of a vehicle-mounted charger provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of the filter circuit shown in FIG. 1;

3 is a schematic diagram of the AC charging processing circuit shown in FIG. 1;

4 is a schematic diagram of the rectification processing circuit shown in FIG. 3;

Figure 5 is a schematic diagram of a vehicle charger system provided by an embodiment of the present application;

FIG. 6 is a schematic flowchart of a manufacturing method of a vehicle-mounted charger provided by an embodiment of the present application.

detailed description

In order to enable those skilled in the art to better understand the solution of the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.

Detailed descriptions are given below.

The terms "first", "second", "third" and "fourth" in the description and claims of the application and the drawings are used to distinguish different objects, rather than describing a specific order . In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes unlisted steps or units, or optionally also includes Other steps or units inherent to these processes, methods, products or equipment.

Reference to "embodiments" herein means that a specific feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art clearly and implicitly understand that the embodiments described herein can be combined with other embodiments.

In the commonly used on-board OBC solutions, OBC is generally independent of the DC/DC converter settings. Although this solution saves some structural parts and port wiring, it still requires a large number of electrical components, high cost, large volume, and degree of integration. Lower. The mains input enters the OBC main transformer through EMC filter circuit, single-phase rectifier circuit, PFC power correction circuit, OBC input side switch circuit, and then transfers energy to the power battery pack through OBC output side rectifier circuit and OBC output side filter circuit. The battery pack transfers energy to the DC/DC main transformer through the DC/DC output side EMC filter circuit and the DC/DC input side switch circuit, and through the DC/DC main transformer, the energy is passed through the DC/DC output side rectifier circuit, DC/DC The DC output side filter circuit is transmitted to the battery. The existing electrical integration solutions can only achieve a single function of battery charging, and cannot meet the diverse needs of reality.

In view of the foregoing problems, the embodiments of the present application propose a vehicle-mounted charger system and a vehicle-mounted charger. The vehicle-mounted charger includes a control circuit, an AC charging processing circuit, and a charging switch protection circuit. The control circuit is connected to the AC charging processing circuit and The charging switch protection circuit, the AC charging processing circuit is connected to the charging switch protection circuit, wherein:

The control circuit is used to connect the battery management system BMS and the vehicle controller; the AC charging processing circuit is used to connect the AC charging pile, the high voltage battery and the low voltage battery, and the charging switch protection circuit is used to connect the DC charging pile, the high voltage Batteries and low-voltage batteries; the charging switch protection circuit supports DC fast charging mode and DC slow charging mode; when the charging switch protection circuit supports the DC fast charging mode, the charging switch protection circuit is connected to the DC charging pile And the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the low-voltage battery; when the charging switch protection circuit supports the DC slow charging mode, the charging switch protection circuit is connected to The DC charging pile and the high-voltage battery, or the charging switch protection circuit connects the DC charging pile and the low-voltage battery. It can be seen that the embodiment of the application expands the detection and control functions of the charger, so that in addition to realizing the AC slow charging function, it can also control DC fast charging, eliminating the process of interaction between the DC charging pile and the battery management system BMS, and then Liberalize the function of the battery management system BMS, optimize the vehicle controller area network and DC power lines. It solves the problem that the traditional integrated on-board charger has a single function and it is difficult to meet the diversified use requirements of the integrated on-board charger in future scenarios.

The embodiments of the present application are described below in conjunction with the drawings.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a vehicle-mounted charger provided by an embodiment of the present application. The vehicle-mounted charger 100 includes a control circuit 110, an AC charging processing circuit 120, and a charging switch protection circuit 130, wherein:

The control circuit 110 is used to connect the battery management system BMS200 and the vehicle controller 400; the AC charging processing circuit 120 is used to connect the AC charging pile, the low-voltage battery 500 and the high-voltage battery 300 through the charging switch protection circuit 130, The charging switch protection circuit 130 is used to connect a DC charging pile, a high-voltage battery 300 and a low-voltage battery 500; the charging switch protection circuit supports a DC fast charging mode and a DC slow charging mode;

When the charging switch protection circuit 130 supports the DC fast charging mode, the charging switch protection circuit 130 is connected to the DC charging pile and the high-voltage battery 300, or the charging switch protection circuit 130 is connected to the DC Charging pile and the low-voltage battery 500;

When the charging switch protection circuit 130 supports the DC slow charging mode, the charging switch protection circuit 130 is connected to the DC charging pile and the high-voltage battery 300, or the charging switch protection circuit 130 is connected to the DC A charging pile and the low-voltage battery 500.

As a possible implementation manner, please refer to FIG. 1. The charging switch protection circuit 130 includes a first relay K1 and a second relay K2; the control circuit 110 is connected to the first relay K1 and the second relay K2. The first relay K1 and the second relay K2 are connected in parallel to the DC charging input port T1 and the charging output port T2 of the on-board charger 100, and the DC charging input port T1 is used to connect to a DC charging pile. The charging output port T2 is used to connect the high-voltage battery 300;

The control circuit 110 is also connected to the DC charging input port T1 to identify the charging mode of the DC charging pile connected to the DC charging input port T1. The charging mode includes the DC fast charging mode and the DC slow charging mode. Charge mode

The charging output port T2 is also connected to the AC charging processing circuit 120 to transmit the DC current obtained by the AC charging processing circuit 120 to the high voltage battery 300.

Wherein, the control circuit 110 detects the input DC power, voltage, current or communication signal by connecting with the DC charging input port T1 to determine whether the current charging mode is DC fast charging mode or DC slow charging mode, and if it is DC fast charging mode, control The circuit 110 controls the first relay K1 to turn on and K2 to turn off; if it is in the DC slow charging mode, the control circuit 110 controls the first relay K1 to turn on and K2 to turn off.

For example, when a user is charging through a DC charging pile, first, a current signal flows in through the DC charging input port T1. After the control circuit 110 detects the current signal of the DC charging input port T1, it is determined to be DC fast according to the information in the current signal. The charging mode is still the DC slow charging mode, or, after the control circuit 110 detects the current signal of the DC charging input port T1, it interacts with the DC charging pile to determine whether it is the DC fast charging mode or the DC slow charging mode, or the user can manually select the charging mode Whether it is DC fast charging mode or DC slow charging mode, the selection signal generated after the user selects is sent to the vehicle controller 400, and the vehicle controller 400 sends the selection signal to the control circuit 110 of the on-board charger 100, and the control circuit 110 then Control; if it is DC fast charging mode, the control circuit 110 turns on the circuit where the first relay K1 is located, and the current signal reaches the charging output port T2 through the first relay K1, the first fuse device F1 and the filter circuit 131; if it is DC In slow charging mode, the control circuit turns on the circuit where the second relay K2 is located, and the current signal reaches the charging output port T2 through the second relay K2, the second fuse F2 and the filter circuit 131; the charging output port T2 is transmitted according to the control circuit 110 The control signal selects the current current signal to be transmitted to the low-voltage battery 500 or the high-voltage battery 300; or the user can manually select the current charging mode, including the high-voltage battery charging mode and the low-voltage battery charging mode. After the user selects, the selection signal is transmitted to the vehicle controller 400. The vehicle controller 400 transmits the signal to the control circuit 110 of the on-board charger 100, and the control circuit 110 controls the charging output port T2 to turn on the corresponding circuit to transmit the current signal to the high-voltage battery 300 or the low-voltage battery 500.

It can be seen that, in this example, the control circuit 110 can effectively communicate with the DC charging pile to identify the charging mode of the DC charging, and then activate the corresponding circuit in a targeted manner to ensure the transmission efficiency of the circuit in different modes. At the same time, since the control circuit 110 can interact with the DC charging pile, the on-board charger 100 includes the control circuit 110, so that the battery management system BMS200 and the vehicle controller 400 only need to be connected to the on-board charger 100 to achieve necessary communication. It is no longer necessary to communicate with the DC charging pile, which simplifies the communication network of the on-board charger 100.

As a possible implementation manner, please refer to FIG. 1. The charging switch protection circuit 130 also includes a first fuse F1, a second fuse F2, and a filter circuit 131; the first relay K1 passes through the first fuse The device F1 is connected to the input terminal of the filter circuit 131; the second relay K2 is connected to the input terminal of the filter circuit 131 through the second fuse device F2; the output terminal of the filter circuit 131 is connected to the charging Output port T2;

The input terminal of the filter circuit 131 is also used to connect to the AC charging processing circuit 120, so that the AC charging processing circuit 120 is connected to the charging output port T2 through the filter circuit 131.

It can be seen that in this example, the safety of the circuit transmission current is ensured by adding insurance devices, and the DC charging process and the AC charging process are completed through the same filter circuit, which not only ensures the quality of current transmission, but also simplifies the on-board charging The line of the machine.

As a possible implementation manner, please refer to FIG. 2. FIG. 2 is a schematic diagram of the filter circuit 131 in FIG. 1. The filter circuit includes a first filter circuit 132, a second filter circuit 133, and a selection control module 134; The control module 134 is connected to the first fuse device F1, the second fuse device F2 and the AC charging processing circuit 120 in FIG. 1, and the selection control module 134 is also connected to the input terminal of the first filter circuit 132 and The input terminal of the second filter circuit 133, the output terminal of the first filter circuit 132 and the output terminal of the second filter circuit 133 are connected to the charging output port T2.

The selection control module 134 first detects whether the current charging current comes from the circuit connected to the fuse device or the AC charging processing circuit 120. If the current charging current comes from the circuit connected to the first fuse device F1 and the circuit connected to the second fuse device F2, The first filter circuit 132 is selected and the circuit connected to the first filter circuit 132 is connected; if the current charging current comes from the AC charging processing circuit 120, the second filter circuit 133 is selected and connected to the second filter circuit 133 Connected circuit.

As a possible implementation manner, please refer to FIG. 3, which is a schematic diagram of the AC charging processing circuit 120 in FIG. 1. The AC charging processing circuit 120 includes a first micro-control unit 121, a second micro-control unit 122, and a second micro-control unit 121. Three micro control unit 123, rectification processing circuit 124, first DC/DC circuit 125, second DC/DC circuit 126 and low voltage interface circuit 127; said first micro control unit 121 is connected to said second micro control unit 122, The third micro-control unit 123 and the rectification processing circuit 124; the rectification processing circuit 124 is connected to the first DC/DC circuit 125 and can be connected to the AC charging pile; the first DC/DC circuit 125 is connected to the high-voltage battery 300, the second micro-control unit 122 and the second DC/DC circuit 126; the second micro-control unit 122 is connected to the high-voltage battery 300; the second DC/DC circuit 126 is connected to the third micro-control unit 123 and the low-voltage battery 500, and the third micro-control unit 123 is connected to the low-voltage interface circuit 127.

Among them, the second micro control unit 122 and the third micro control unit 123 monitor and sample the DC/DC circuit in real time, and adjust the DC/DC according to actual voltage and current conditions.

For example, after the on-board charger is connected to the AC charging pile, the AC power output by the AC charging pile is transmitted to the AC charging processing circuit 120 of the on-board charger through the AC charging line. The rectifying processing circuit 124 in the AC charging processing circuit 120 first performs AC power Rectified, after rectification, the alternating current becomes direct current. The direct current passes through the power factor correction circuit to improve the power factor of the electrical equipment. After that, the direct current is transformed by the first DC/DC circuit 125 and then transferred to the high-voltage battery 300 or to the second DC/ The DC circuit 126 is transformed by the second DC/DC circuit 126 and transmitted to the low-voltage battery 500.

As a possible implementation manner, please refer to FIG. 4, which is a schematic diagram of the rectification processing circuit 124 shown in FIG. 3. The rectification processing circuit 124 includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4. The anode of the first diode D1 is connected to the third diode. The cathode of the diode D3, the anode of the first diode D1 and the cathode of the third diode D3 have the first input terminal 241 of the rectifier module, and the second diode D2 The anode of the second diode D4 is connected to the cathode of the fourth diode D4, and the second input terminal 242 of the rectifier module is provided between the anode of the second diode D2 and the cathode of the fourth diode D4, so The cathode of the first diode D1 and the cathode of the second diode D2 are connected together and output to the DC bus, the anode of the third diode D3 and the anode of the fourth diode D4 Connect together and connect to ground.

As a possible implementation, the on-board charger 100 further includes a charge-discharge and power conversion assembly; the input end of the charge-discharge and power conversion assembly is connected to the AC charging processing circuit 120 and the charging switch protection The circuit 130, the low-voltage battery 500 and the high-voltage battery 300; the output end of the charge-discharge and power conversion assembly is connected to a fan, an air conditioner, a thermistor PTC, and a motor.

Wherein, the charging and discharging and power conversion assembly can convert any of the DC power output by the AC charging processing circuit 120, the DC power output by the charging switch protection circuit 120, and the electrical energy of the low-voltage battery 500 and the high-voltage battery 300 The item performs power conversion and matches the power of any one of the fan, air conditioner, thermistor PTC and motor, and then outputs it by the corresponding connection circuit.

An embodiment of the present application provides a vehicle-mounted charging system. Please refer to FIG. 5. FIG. 5 is a schematic diagram of the vehicle-mounted charging system. The vehicle-mounted charging system includes a vehicle controller module 601, a battery management system BMS module 602, and a high-voltage battery module. 603. On-board charger module 604 and low-voltage battery module 605;

The vehicle controller module 601 is connected to the vehicle charger module 604, the battery management system module BMS602 is connected to the vehicle charger module 604, and the high-voltage battery module 603 is connected to the vehicle charger module 604. The vehicle-mounted charger module 604 is connected to the low-voltage battery module 605, and the vehicle-mounted charger module 604 is also used to connect an external DC charging pile and an external AC charging pile.

In a possible example, the on-board charger module 604 includes a control circuit, an AC charging processing circuit, and a charging switch protection circuit. The control circuit is connected to the AC charging processing circuit and the charging switch protection circuit. The charging processing circuit is connected to the charging switch protection circuit;

The control circuit is connected to the battery management system BMS module 602 and the vehicle controller module 601; the AC charging processing circuit is connected to the high-voltage battery module 603 and the low-voltage battery module 605, and is connected to an AC charging pile; The charging switch protection circuit is connected to the high-voltage battery module 603 and the low-voltage battery module 605, and is used to connect to a DC charging pile; the charging switch protection circuit supports a DC fast charging mode and a DC slow charging mode.

When the charging switch protection circuit supports the DC fast charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery module 603, or the charging switch protection circuit is connected to the DC charging pile And the low-voltage battery module 605;

When the charging switch protection circuit supports the DC slow charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery module 603, or the charging switch protection circuit is connected to the DC charging pile And the low-voltage battery module 605.

In a possible example, the charging switch protection circuit includes a first relay and a second relay; the control circuit connects the first relay and the second relay, and the first relay and the second relay Connecting in parallel the DC charging input port and the charging output port of the on-board charger, the DC charging input port is used to connect to a DC charging pile, and the DC charging output port is connected to the high-voltage battery module 603;

The control circuit is also connected to the DC charging input port to identify the charging mode of the DC charging pile connected to the DC charging input port, and the charging mode includes the DC fast charging mode and the DC slow charging mode;

The charging output port is also connected to the AC charging processing circuit to transmit the DC current obtained by the AC charging processing circuit to the high voltage battery module 603.

It can be seen that in this example, through the expansion of the detection and control functions of the charger, in addition to the AC slow charging function, it can also control the DC fast charging, eliminating the process of interaction between the DC charging pile and the battery management system BMS , Thus liberating the function of the battery management system BMS, optimizing the vehicle controller area network and DC power lines. It solves the problem that the traditional integrated on-board charger has a single function and it is difficult to meet the diversified use requirements of the integrated on-board charger in future scenarios.

Please refer to FIG. 6. FIG. 6 is a schematic flowchart of a manufacturing method of a vehicle charger provided by an embodiment of the present application, which is applied to a vehicle charger including a control circuit, an AC charging processing circuit, and a charging switch protection circuit. The method includes :

Step 701: Connect the control circuit to the AC charging processing circuit and the charging switch protection circuit;

Step 702: Connect the AC charging processing circuit to the charging switch protection circuit;

Wherein, the control circuit is used to connect the battery management system BMS and the vehicle controller; the AC charging processing circuit is used to connect the AC charging pile, the high voltage battery and the low voltage battery, and the charging switch protection circuit is used to connect the DC charging pile , High-voltage battery and low-voltage battery; The charging switch protection circuit supports DC fast charging mode and DC slow charging mode;

When the charging switch protection circuit supports the DC fast charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery. The low-voltage battery;

When the charging switch protection circuit supports the DC slow charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery.述low-voltage battery.

It should be noted that for the foregoing application embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should know that this application is not limited by the described sequence of actions. Because according to this application, some steps can be performed in other order or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

In the above-mentioned embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed device may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the above-mentioned units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

The units described above as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

The embodiments of the application are described in detail above, and specific examples are used in this article to illustrate the principles and implementation of the application. The descriptions of the above embodiments are only used to help understand the application and its core ideas; at the same time, for the field According to the ideas of the application, the general technical personnel of, will have changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as a limitation of the application.

Claims (11)

A vehicle-mounted charger, characterized in that, the vehicle-mounted charger includes a control circuit, an AC charging processing circuit, and a charging switch protection circuit, the control circuit is connected to the AC charging processing circuit and the charging switch protection circuit, and the The AC charging processing circuit is connected to the charging switch protection circuit; The control circuit is used to connect the battery management system BMS and the vehicle controller; the AC charging processing circuit is used to connect the AC charging pile, the high voltage battery and the low voltage battery, and the charging switch protection circuit is used to connect the DC charging pile, the high voltage Batteries and low-voltage batteries; the charging switch protection circuit supports DC fast charging mode and DC slow charging mode; When the charging switch protection circuit supports the DC fast charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery. The low-voltage battery; When the charging switch protection circuit supports the DC slow charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery.述low-voltage battery. The vehicle-mounted charger according to claim 1, wherein the charging switch protection circuit comprises a first relay and a second relay; the control circuit connects the first relay and the second relay, and the first relay A relay and the second relay are connected in parallel to the DC charging input port and the charging output port of the on-board charger, the DC charging input port is used to connect to a DC charging pile, and the charging output port is used to connect to the high-voltage battery ； The control circuit is also connected to the DC charging input port to identify a charging mode of the DC charging connected to the DC charging input port, the charging mode including the DC fast charging mode and the DC slow charging mode; The charging output port is also connected to the AC charging processing circuit to transmit the DC current obtained by the AC charging processing circuit to the high voltage battery. The vehicle-mounted charger according to claim 2, wherein the charging switch protection circuit further comprises a first fuse device, a second fuse device, and a filter circuit; the first relay is connected to the power station through the first fuse device The input terminal of the filter circuit; the second relay is connected to the input terminal of the filter circuit through the second fuse device; the output terminal of the filter circuit is connected to the charging output port; The input terminal of the filter circuit is also used to connect to the AC charging processing circuit, so that the AC charging processing circuit is connected to the charging output port through the filter circuit. The vehicle charger according to claim 3, wherein the filter circuit includes a first filter circuit, a second filter circuit, and a selection control module; the selection control module is connected to the first insurance device and the first Two insurance devices and the AC charging processing circuit, the selection control module is also connected to the input terminal of the first filter circuit and the input terminal of the second filter circuit, the output terminal of the first filter circuit and the The output terminal of the second filter circuit is connected to the charging output port. The vehicle-mounted charger according to claim 1, wherein the AC charging processing circuit includes a first micro-control unit, a second micro-control unit, a third micro-control unit, a rectification processing circuit, and a first DC/DC circuit , A second DC/DC circuit and a low-voltage interface circuit; the first micro-control unit is connected to the second micro-control unit, the third micro-control unit and the rectification processing circuit; the rectification processing circuit is connected to the The first DC/DC circuit can be connected to the AC charging pile; the first DC/DC circuit is connected to the high-voltage battery, the second micro-control unit and the second DC/DC circuit; the first Two micro control units MCU are connected to the high voltage battery; the second DC/DC circuit is connected to the third micro control unit and the low voltage battery, and the third micro control unit is connected to the low voltage interface circuit. The vehicle-mounted charger of claim 5, wherein the rectification processing circuit includes a first diode, a second diode, a third diode, and a fourth diode, and the first two The anode of the pole tube is connected to the cathode of the third diode, the first input terminal of the rectifier module is provided between the anode of the first diode and the cathode of the third diode. The anodes of the two diodes are connected to the cathode of the fourth diode, and the second input terminal of the rectifier module is provided between the anode of the second diode and the cathode of the fourth diode, so The cathode of the first diode and the cathode of the second diode are connected together and output to the DC bus, the anode of the third diode and the anode of the fourth diode are connected together and Connected to the ground. The vehicle-mounted charger of claim 1, wherein the vehicle-mounted charger further comprises a charge-discharge and power conversion assembly; the input end of the charge-discharge and power conversion assembly is connected to the AC charging processing circuit, The charging switch protection circuit, the low-voltage battery and the high-voltage battery; the output end of the charging and discharging and power conversion assembly is connected to a fan, an air conditioner, a thermistor PTC and a motor. A vehicle-mounted charging system, comprising a vehicle controller, a battery management system BMS, a high-voltage battery, and a low-voltage battery, and is characterized in that it further comprises the vehicle-mounted charger according to any one of claims 1-7 The vehicle controller is connected to the vehicle charger, the battery management system BMS is connected to the vehicle charger, the high voltage battery is connected to the vehicle charger, the vehicle charger is connected to the low voltage battery, the The on-board charger is also used to connect an external DC charging pile and an external AC charging pile. The vehicle-mounted charger system according to claim 8, wherein the vehicle-mounted charger includes a control circuit, an AC charging processing circuit, and a charging switch protection circuit, and the control circuit is connected to the AC charging processing circuit and the charging circuit. A switch protection circuit, the AC charging processing circuit is connected to the charging switch protection circuit; The control circuit is connected to the battery management system BMS and the vehicle controller; the AC charging processing circuit is connected to the high voltage battery and the low voltage battery, and to an AC charging pile; the charging switch protection circuit is connected to the high voltage A battery and the low-voltage battery, and used to connect to a DC charging pile; the charging switch protection circuit supports a DC fast charging mode and a DC slow charging mode; When the charging switch protection circuit supports the DC fast charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery. The low-voltage battery; When the charging switch protection circuit supports the DC slow charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery.述low-voltage battery. The vehicle-mounted charger system according to claim 9, wherein the charging switch protection circuit includes a first relay and a second relay; the control circuit is connected to the first relay and the second relay, and the The first relay and the second relay are connected in parallel to the DC charging input port and the charging output port of the on-board charger, the DC charging input port is used to connect to a DC charging pile, and the DC charging output port is connected to the high-voltage battery ； The control circuit is also connected to the DC charging input port to identify the charging mode of the DC charging connected to the DC charging input port, the charging mode including the DC fast charging mode and the DC slow charging mode; The charging output port is also connected to the AC charging processing circuit to transmit the DC current obtained by the AC charging processing circuit to the high-voltage battery. A method for manufacturing a vehicle-mounted charger, characterized in that it is applied to a vehicle-mounted charger including a control circuit, an AC charging processing circuit, and a charging switch protection circuit, and the method includes: Connecting the control circuit to the AC charging processing circuit and the charging switch protection circuit; Connecting the AC charging processing circuit to the charging switch protection circuit; The control circuit is used to connect the battery management system BMS and the vehicle controller; the AC charging processing circuit is used to connect the AC charging pile, the high-voltage battery and the low-voltage battery, and the charging switch protection circuit is used to connect the DC charging pile, the high voltage Batteries and low-voltage batteries; the charging switch protection circuit supports DC fast charging mode and DC slow charging mode; When the charging switch protection circuit supports the DC fast charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery. The low-voltage battery; When the charging switch protection circuit supports the DC slow charging mode, the charging switch protection circuit is connected to the DC charging pile and the high-voltage battery, or the charging switch protection circuit is connected to the DC charging pile and the high voltage battery.述low-voltage battery.

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