A charging method and charging system for a high-voltage power battery of a hybrid vehicle

Abstract

The present application discloses a charging method and a charging system for a high-voltage power battery of a hybrid vehicle, wherein the output positive high-voltage line and the output negative high-voltage line connected to the motor controller in the high-voltage power battery are disconnected; the output positive high-voltage line and the output negative high-voltage line are connected to a conversion charging device for connecting a charging pile or an AC power supply, and the high-voltage power battery is charged by the charging pile or the AC power supply. The method realizes charging the high-voltage power battery using a charging pile and an AC power supply without changing the original function and structure of the high-voltage power battery not equipped with a charging port, and the operation is simple and the cost is low, which greatly improves the convenience of charging the high-voltage power battery not equipped with a charging port.

Description

Technical Field

[0001] The present application relates to the technical field of new energy hybrid electric vehicles, and in particular to a charging method and a charging system for a high-voltage power battery of a hybrid electric vehicle. Background Art

[0002] As the energy shortage problem becomes increasingly serious, new energy hybrid vehicles are gradually replacing traditional pure diesel vehicles and pure gasoline vehicles and becoming the main force of today's transportation. In new energy hybrid vehicles, new energy power batteries are generally used to provide part of the power for the vehicle.

[0003] The high-voltage power battery on new energy hybrid commercial vehicles is mainly used to power the vehicle's drive motor, which drives the engine to start and start the vehicle. When the high-voltage power battery is low on power, it will not be able to drive the motor, causing the vehicle to fail to start. When the existing new energy hybrid commercial vehicles are running, the high-voltage power battery uses less power, so the high-voltage power battery on commercial vehicles is generally not equipped with a charging port. When the high-voltage power battery is low on power, the vehicle cannot be started and used, and the power battery needs to be removed and returned to the manufacturer for recharging. In addition, special equipment from the manufacturer needs to be used for recharging, which has problems such as inconvenient operation, inability to promote, and difficulty in charging. It will seriously affect the normal use of the vehicle and cause economic losses to the owner.

[0004] Therefore, how to conveniently and quickly charge a high-voltage power battery that is not equipped with a charging port on a vehicle is a technical problem that needs to be solved. Summary of the invention

[0005] The main purpose of the present application is to provide a charging method and a charging system for a high-voltage power battery of a hybrid vehicle, aiming to solve the technical problem that a high-voltage power battery that is not equipped with a charging port needs to be returned to the factory to be charged using specific equipment.

[0006] In a first aspect, the present application provides a method for charging a high-voltage power battery of a hybrid vehicle, the method comprising the following steps:

[0007] Disconnect the output positive high-voltage wire and the output negative high-voltage wire of the high-voltage power battery connected to the motor controller;

[0008] The output positive high voltage line and the output negative high voltage line are connected to a conversion charging device for connecting a charging pile or an AC power supply, and the high voltage power battery is charged through the charging pile or the AC power supply.

[0009] In some embodiments, while connecting the output positive high voltage line and the output negative high voltage line to a conversion charging device for connecting a charging pile or an AC power source, the method further includes:

[0010] Connect the low-voltage signal line of the battery management system BMS of the high-voltage power battery to the low-voltage interface of the conversion charging device.

[0011] In some embodiments, when the conversion charging device is used to connect to a charging pile, the conversion charging device includes a charging gun insertion interface.

[0012] In some embodiments, charging the high-voltage power battery through a charging pile specifically includes the following steps:

[0013] Insert the charging gun of the charging pile into the charging gun insertion interface of the conversion charging device, so that the charging pile sends a charging wake-up A+ signal to the BMS;

[0014] When the BMS detects the charging wake-up A+ signal sent by the charging pile, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to close, so that the charging pile charges the high-voltage power battery;

[0015] When charging is completed, the BMS controls the main positive contactor and the main negative contactor in the high-voltage power battery to disconnect, so that the charging pile stops charging the high-voltage power battery.

[0016] In some embodiments, when the conversion and charging device is used to connect to an AC power source, the conversion and charging device includes an AC / DC conversion module AC / DC, an on-board charging module OBC and a charging plug.

[0017] In some embodiments, charging the high-voltage power battery through an AC power supply specifically includes the following steps:

[0018] Insert the plug of the conversion charging device into an AC power source so that the OBC sends a charging wake-up A+ signal to the BMS;

[0019] When the BMS detects the charging wake-up A+ signal sent by the OBC, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to close, so that the AC power supply charges the high-voltage power battery;

[0020] When charging is completed, the BMS controls the main positive contactor and the main negative contactor in the high-voltage power battery to be disconnected, so that the AC power supply stops charging the high-voltage power battery.

[0021] In a second aspect, the present application also provides a charging system for a high-voltage power battery of a hybrid vehicle, the system comprising:

[0022] A conversion charging device, which is used to connect to a charging pile or an AC power source;

[0023] The output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery are used to connect to the motor controller of the vehicle when the high-voltage power battery does not need to be charged, and to disconnect from the motor controller when the high-voltage power battery needs to be charged, and to connect to the conversion charging device to charge the high-voltage power battery through a charging pile or an AC power supply.

[0024] In some embodiments, the system further comprises:

[0025] The low-voltage signal line of the BMS is used to connect with the low-voltage interface of the conversion charging device.

[0026] In some embodiments, when the conversion charging device is used to connect to a charging pile, the conversion charging device includes a charging gun insertion interface.

[0027] In some embodiments, the BMS is also used for:

[0028] When the charging wake-up A+ signal sent by the charging pile is detected, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to be closed so that the charging pile charges the high-voltage power battery. When the charging is completed, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to be disconnected so that the charging pile stops charging the high-voltage power battery.

[0029] In some embodiments, when the conversion and charging device is used to connect to an AC power source, the conversion and charging device includes an AC / DC conversion module AC / DC, an on-board charging module OBC and a charging plug.

[0030] In some embodiments, the BMS is also used for:

[0031] When the charging wake-up A+ signal sent by the OBC is detected, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to close, so that the AC power supply charges the high-voltage power battery;

[0032] When charging is completed, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to be disconnected, so that the AC power source stops charging the high-voltage power battery.

[0033] The present application provides a charging method and a charging system for a high-voltage power battery of a hybrid vehicle, wherein the output positive high-voltage line and the output negative high-voltage line connected to a motor controller in the high-voltage power battery are disconnected; the output positive high-voltage line and the output negative high-voltage line are connected to a conversion charging device for connecting a charging pile or an AC power supply, and the high-voltage power battery is charged through the charging pile or the AC power supply. The method realizes charging the high-voltage power battery through the charging pile and the AC power supply without changing the original function and structure of the high-voltage power battery not equipped with a charging port, and the operation is simple and the cost is low, which greatly improves the convenience of charging the high-voltage power battery not equipped with a charging port. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 A schematic flow chart of a method for charging a high-voltage power battery of a hybrid vehicle provided in an embodiment of the present application;

[0036] Figure 2 This is a schematic diagram of the original structure of the high-voltage power battery;

[0037] Figure 3 It is a schematic diagram of the structure of the charging system of the high-voltage power battery when the charging device is used to connect to the charging pile;

[0038] Figure 4 A schematic diagram of a specific connection structure of a charging device when the charging device is used to connect to a charging pile;

[0039] Figure 5 It is a schematic diagram of the structure of the charging system of the high-voltage power battery when the charging device is used to connect to an AC power source;

[0040] Figure 6 The figure is a schematic diagram of the specific connection structure of the charging device when the charging device is used to connect to an AC power source.

[0041] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0044] The embodiments of the present application provide a charging method and a charging system for a high-voltage power battery of a hybrid vehicle.

[0045] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0046] Please refer to Figure 1 , Figure 1 A schematic flow chart of a method for charging a high-voltage power battery of a hybrid vehicle provided in an embodiment of the present application.

[0047] like Figure 1 As shown, the method includes steps S1 to S12.

[0048] Step S1, disconnecting the output positive high voltage line and the output negative high voltage line of the high voltage power battery connected to the motor controller.

[0049] It is worth mentioning that in commercial vehicles, the main function of the high-voltage power battery is to supply power to the drive motor so that the drive motor can work and drive the engine to start. The original structure of the high-voltage power battery is shown below: Figure 2 The high-voltage power battery includes an output positive high-voltage line and an output negative high-voltage line. The output positive high-voltage line is connected to the positive pole of the motor controller, and the output negative high-voltage line is connected to the negative pole of the motor controller.

[0050] like Figure 2As shown, the high-voltage motor battery includes a main positive contactor K1 and a main negative contactor K2. The main positive contactor K1 and the main negative contactor K2 are switches used to control the high-voltage power battery to supply high voltage to the drive motor. When the main positive contactor K1 and the main negative contactor K2 are closed, the high-voltage power battery is connected to the drive motor to supply power to the drive motor. When the main positive contactor K1 and the main negative contactor K2 are disconnected, the power supply line is disconnected, and the high-voltage power battery stops supplying power to the drive motor. The main positive contactor K1 and the main negative contactor K2 are controlled by the battery management system BMS. The battery management system BMS controls the closing and disconnection of the main positive contactor K1 and the main negative contactor K2 according to whether the high-voltage power battery needs to supply power to the drive motor.

[0051] In addition, Figure 2 As shown, the high-voltage power battery also includes: a pre-charge contactor K3, a temperature control unit contactor K4, a pre-charge resistor R1, a main fuse F1, a DCDC fuse F2 and a temperature control unit fuse F3, and their functions and specific work processes are not repeated here.

[0052] As a preferred embodiment, the disconnection and connection between the positive high-voltage line of the high-voltage power battery output and the positive pole of the motor controller, and the disconnection and connection between the negative high-voltage line of the high-voltage power battery output and the negative pole of the motor controller can be achieved through a plug-in connector. For example, a plug-in connector is provided on the positive high-voltage line of the output and the negative high-voltage line of the output, and matching plug-in interfaces are provided at the positive and negative poles of the motor controller. The plug-in connector is inserted into the corresponding plug-in interface according to the positive and negative poles to achieve the connection between the high-voltage power battery and the motor controller, and then the high-voltage power battery and the motor controller can be disconnected by manually unplugging the plug-in connector of the high-voltage power battery.

[0053] It is worth noting that when disconnecting the output positive high-voltage wire and the output negative high-voltage wire of the high-voltage power battery from the motor controller, it is necessary to ensure that the vehicle is in a power-off state to prevent leakage problems and ensure the safety of the operator. For example, a vehicle power-on status indicator light can be set at the interface. When the vehicle is powered on, the power-on status indicator light is on, and when the vehicle is powered off, the power-on status indicator light is off. The operator can disconnect the output positive high-voltage wire and the output negative high-voltage wire of the high-voltage power battery from the motor controller after the power-on status indicator light is off.

[0054] Step S2: Connect the output positive high voltage line and the output negative high voltage line to a conversion charging device for connecting a charging pile or an AC power supply, and charge the high voltage power battery through the charging pile or the AC power supply.

[0055] It is worth noting that when the output positive high-voltage line and the output negative high-voltage line are connected to a conversion charging device for connecting a charging pile or an AC power supply, it also includes: connecting the low-voltage signal line of the battery management system BMS of the high-voltage power battery to the low-voltage interface of the conversion charging device.

[0056] In a specific embodiment, when the conversion charging device is used to connect to a charging pile, the conversion charging device includes a charging gun insertion interface.

[0057] Specifically, Figure 3 and Figure 4 As shown, the same plug-in interfaces as those at the positive and negative poles of the motor controller can be provided at the positive high-voltage line and the negative high-voltage line of the conversion charging device to adapt to the plug-in connectors of the positive high-voltage line and the negative high-voltage line of the high-voltage battery output. When the positive high-voltage line and the negative high-voltage line of the high-voltage power battery output are connected to the conversion charging device for connecting the charging pile, the plug-in connector of the positive high-voltage line of the high-voltage power battery output is connected to the plug-in connector of the positive pole of the conversion charging device, and the plug-in connector of the high-voltage power battery is connected to the plug-in connector of the conversion charging device. At the same time, the low-voltage signal line of the battery management system BMS of the high-voltage power battery is also connected to the low-voltage interface of the conversion charging device, so that the battery management system BMS can receive the charging signal sent by the charging pile through the conversion charging device.

[0058] As a preferred implementation, charging the high-voltage power battery through a charging pile specifically includes the following steps:

[0059] Insert the charging gun of the charging pile into the charging gun insertion interface of the conversion charging device, so that the charging pile sends a charging wake-up A+ signal to the BMS; when the BMS detects the charging wake-up A+ signal sent by the charging pile, it controls the main positive contactor and the main negative contactor in the high-voltage power battery to close, so that the charging pile charges the high-voltage power battery; when charging is completed, the BMS controls the main positive contactor and the main negative contactor in the high-voltage power battery to disconnect, so that the charging pile stops charging the high-voltage power battery.

[0060] It should be understood that after the high-voltage power battery is connected to the conversion charging device, the charging gun of the charging pile is inserted into the charging gun insertion interface of the conversion charging device, and the charging pile will send a charging wake-up A+ signal, which is transmitted to the battery management system BMS through the low-voltage interface of the conversion charging device. When the battery management system BMS receives the charging wake-up A+ signal, it can be confirmed that the charging pile will charge the high-voltage power battery. Then the battery management system BMS will perform insulation detection. After the insulation detection is qualified, it will control the main positive contactor K1 and the main negative contactor K2 of the high-voltage power battery to be closed, so that the charging pile performs high-voltage charging for the high-voltage power battery. In this process, the output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery are used as charging lines, and the main positive contactor K1 and the main negative contactor K2 of the power battery are reused as charging positive contactors and charging negative contactors to ensure charging safety.

[0061] In some embodiments, after the high-voltage power battery is charged, the battery management system BMS controls the main positive contactor K1 and the main negative contactor K2 to disconnect, and then the charging indicator light can be flashed to inform the operator that the charging is complete. After charging is completed, the charging gun needs to be disconnected from the conversion charging device, and then the conversion charging device needs to be disconnected from the output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery, and the output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery need to be reconnected to the motor controller so that the high-voltage power battery can continue to supply power to the drive motor.

[0062] It is worth noting that when the charging time of the high-voltage power battery charged by the charging pile reaches the preset time, or the voltage of the high-voltage power battery reaches the preset voltage, it can be determined that the high-voltage power battery charging is completed. The battery management system BMS feeds back the high-voltage power battery charging completion signal to the charging pile, and then disconnects the charging pile and the conversion charging device first, and then disconnects the conversion charging device and the output positive high-voltage line and output negative high-voltage line of the high-voltage power battery, in order to prevent leakage when disconnecting the conversion charging device and the output high-voltage line of the high-voltage power battery, so as to ensure the health and safety of the operator.

[0063] In a specific embodiment, when the conversion charging device is used to connect to an AC power source, the conversion charging device includes an AC / DC conversion module AC / DC, an on-board charging module OBC and a charging plug.

[0064] It is worth noting that the AC power supply in this embodiment can be a household 220V AC power supply.

[0065] Specifically, Figure 5 and Figure 6As shown, similarly, plug-in interfaces identical to the positive and negative electrodes of the motor controller can be provided at the positive high-voltage wire and the negative high-voltage wire of the conversion charging device of the high-voltage power battery, so as to adapt to the plug-in connectors of the positive high-voltage wire and the negative high-voltage wire output of the high-voltage battery. When the positive high-voltage wire and the negative high-voltage wire output of the high-voltage power battery are connected to the conversion charging device for connecting an AC power source, the plug-in connector of the positive high-voltage wire output of the high-voltage power battery is connected to the plug-in connector of the positive electrode of the conversion charging device, and the plug-in connector of the high-voltage power battery is connected to the plug-in connector of the conversion charging device. At the same time, the low-voltage signal line of the battery management system BMS of the high-voltage power battery is also connected to the low-voltage interface of the conversion charging device.

[0066] As a preferred implementation, charging the high-voltage power battery through a charging pile specifically includes the following steps: inserting the plug of the conversion charging device into an AC power supply so that the OBC sends a charging wake-up A+ signal to the BMS; when the BMS detects the charging wake-up A+ signal sent by the OBC, it controls the main positive contactor and the main negative contactor in the high-voltage power battery to close so that the AC power supply charges the high-voltage power battery; when charging is completed, the BMS controls the main positive contactor and the main negative contactor in the high-voltage power battery to disconnect so that the AC power supply stops charging the high-voltage power battery.

[0067] It should be understood that when charging the high-voltage power battery, direct current is required. The charging pile is direct current, so the high-voltage power battery can be charged directly. For AC power, it is necessary to convert the AC power into direct current through the AC / DC conversion module before charging. After the high-voltage power battery is connected to the conversion charging device, when the plug of the conversion charging device is inserted into the 220V AC power socket, the on-board charging module OBC will enter the charging mode and send a charging wake-up A+ signal to the battery management system BMS. When the battery management system BMS receives the charging wake-up signal, it can be confirmed that the charging pile will charge the high-voltage power battery, and then perform insulation detection. After the insulation test is qualified, the main positive contactor and the main negative contactor of the high-voltage power battery will be controlled to close, so that the charging pile can charge the high-voltage power battery at high voltage. During the charging process, the electricity charged by the AC power supply is converted into DC through the DC conversion module AC / DC, and the OBC starts to charge the high-voltage power battery according to the set power.

[0068] In this process, the output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery are used as charging lines, and the main positive contactor K1 and the main negative contactor K2 of the power battery are reused as the charging positive contactor and the charging negative contactor to ensure charging safety.

[0069] In some embodiments, after the high-voltage power battery is charged, the battery management system BMS controls the main positive contactor and the main negative contactor to disconnect, and then the operator can be informed of the completion of charging by sending a charging completion prompt message to the operator. After charging is completed, it is necessary to unplug the plug to disconnect the AC power supply and the conversion charging device, and then disconnect the conversion charging device from the output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery, and reconnect the output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery to the motor controller, so that the high-voltage power battery can continue to supply power to the drive motor.

[0070] It is worth noting that when the battery management system BMS feeds back the high-voltage power battery charging completion signal to the charging pile, it can be determined that the high-voltage power battery charging is completed. The purpose of disconnecting the charging pile from the conversion charging device and then disconnecting the conversion charging device from the output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery is to prevent leakage when disconnecting the output high-voltage line of the conversion charging device and the high-voltage power battery, so as to ensure the health and safety of the operator.

[0071] The embodiment of the present application provides a charging method for a high-voltage power battery of a hybrid vehicle, by disconnecting the output positive high-voltage line and the output negative high-voltage line connected to the motor controller in the high-voltage power battery; connecting the output positive high-voltage line and the output negative high-voltage line to a conversion charging device for connecting a charging pile or an AC power supply, and charging the high-voltage power battery through the charging pile or the AC power supply. The output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery are reused, and the main positive contactor and the main negative contactor are reused as the charging positive contactor and the charging negative contactor, thereby realizing the charging of the high-voltage power battery through the charging pile and the AC power supply without changing the original function and structure of the high-voltage power battery not equipped with a charging port, and the operation is simple and the cost is low, which greatly improves the convenience of charging the high-voltage power battery not equipped with a charging port.

[0072] In a second aspect, the present application provides a charging system for a high-voltage power battery of a hybrid vehicle, the system comprising:

[0073] A conversion charging device, which is used to connect to a charging pile or an AC power source;

[0074] The output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery are used to connect to the motor controller of the vehicle when the high-voltage power battery does not need to be charged, and to disconnect from the motor controller when the high-voltage power battery needs to be charged, and to connect to the conversion charging device to charge the high-voltage power battery through a charging pile or an AC power supply.

[0075] In some embodiments, the system further comprises:

[0076] The low-voltage signal line of the BMS is used to connect with the low-voltage interface of the conversion charging device.

[0077] In some embodiments, when the conversion charging device is used to connect to a charging pile, the conversion charging device includes a charging gun insertion interface.

[0078] In some embodiments, the BMS is also used for:

[0079] When the charging wake-up A+ signal sent by the charging pile is detected, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to be closed so that the charging pile charges the high-voltage power battery. When the charging is completed, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to be disconnected so that the charging pile stops charging the high-voltage power battery.

[0080] Specifically, after the high-voltage power battery is connected to the conversion charging device, the charging gun of the charging pile is inserted into the charging gun insertion interface of the conversion charging device, and the charging pile will send a charging wake-up A+ signal, which is transmitted to the battery management system BMS through the low-voltage interface of the conversion charging device. When the battery management system BMS receives the charging wake-up A+ signal, it can be confirmed that the charging pile will charge the high-voltage power battery. Then the battery management system BMS will perform insulation detection. After the insulation detection is qualified, it will control the main positive contactor K1 and the main negative contactor K2 of the high-voltage power battery to be closed, so that the charging pile performs high-voltage charging for the high-voltage power battery. In this process, the output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery are used as charging lines, and the main positive contactor K1 and the main negative contactor K2 of the power battery are reused as the charging positive contactor and the charging negative contactor to ensure charging safety.

[0081] In some embodiments, when the conversion and charging device is used to connect to an AC power source, the conversion and charging device includes an AC / DC conversion module AC / DC, an on-board charging module OBC and a charging plug.

[0082] In some embodiments, the BMS is also used for:

[0083] When the charging wake-up A+ signal sent by the OBC is detected, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to close, so that the AC power supply charges the high-voltage power battery;

[0084] When charging is completed, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to be disconnected, so that the AC power source stops charging the high-voltage power battery.

[0085] Specifically, when charging the high-voltage power battery, direct current is required. The charging pile is direct current, so the high-voltage power battery can be charged directly. For AC power, it is necessary to convert the AC power into direct current through the AC / DC conversion module before charging. After the high-voltage power battery is connected to the conversion charging device, when the plug of the conversion charging device is inserted into the 220V AC power socket, the on-board charging module OBC will enter the charging mode and send a charging wake-up A+ signal to the battery management system BMS. When the battery management system BMS receives the charging wake-up signal, it can be confirmed that the charging pile will charge the high-voltage power battery, and then perform insulation detection. After the insulation test is qualified, the main positive contactor and the main negative contactor of the high-voltage power battery will be controlled to close, so that the charging pile can charge the high-voltage power battery at high voltage. During the charging process, the electricity charged by the AC power supply is converted into DC through the DC conversion module AC / DC, and the OBC starts to charge the high-voltage power battery according to the set power.

[0086] It should be noted that those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and modules and units can refer to the corresponding processes in the aforementioned embodiments and will not be repeated here.

[0087] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0088] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0089] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for charging a high-voltage power battery of a hybrid vehicle, characterized in that: The following steps are involved: Disconnect the output positive high-voltage wire and the output negative high-voltage wire of the high-voltage power battery connected to the motor controller; Connecting the output positive high voltage line and the output negative high voltage line to a conversion charging device for connecting a charging pile or an AC power supply, and charging the high voltage power battery through the charging pile or the AC power supply; The high-voltage power battery output positive high-voltage line and the motor controller positive pole are disconnected and connected, and the high-voltage power battery output negative high-voltage line and the motor controller negative pole are disconnected and connected through the plug-in connector; Plug-in interfaces identical to those at the positive and negative poles of the motor controller are provided at the positive and negative high-voltage lines of the conversion charging device to adapt to the plug-in connectors of the positive and negative output high-voltage lines of the high-voltage battery.

2. The method for charging a high-voltage power battery of a hybrid vehicle according to claim 1, characterized in that: While connecting the output positive high voltage line and the output negative high voltage line to a conversion charging device for connecting a charging pile or an AC power source, the method further includes: Connect the low-voltage signal line of the battery management system BMS of the high-voltage power battery to the low-voltage interface of the conversion charging device.

3. The method for charging a high-voltage power battery of a hybrid vehicle according to claim 2, characterized in that: When the conversion charging device is used to connect to a charging pile, the conversion charging device includes a charging gun insertion interface.

4. The method for charging a high-voltage power battery of a hybrid vehicle according to claim 3, characterized in that: Charging the high-voltage power battery through a charging pile specifically includes the following steps: Insert the charging gun of the charging pile into the charging gun insertion interface of the conversion charging device, so that the charging pile sends a charging wake-up A+ signal to the BMS; When the BMS detects the charging wake-up A+ signal sent by the charging pile, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to close, so that the charging pile charges the high-voltage power battery; When charging is completed, the BMS controls the main positive contactor and the main negative contactor in the high-voltage power battery to be disconnected, so that the charging pile stops charging the high-voltage power battery.

5. The method for charging a high-voltage power battery of a hybrid vehicle according to claim 2, characterized in that: When the conversion charging device is used to be connected to an AC power source, the conversion charging device includes an AC / DC conversion module AC / DC, an on-board charging module OBC and a charging plug.

6. The method for charging a high-voltage power battery of a hybrid vehicle according to claim 4, characterized in that: Charging the high-voltage power battery through an AC power supply specifically includes the following steps: Insert the plug of the conversion charging device into an AC power source so that the OBC sends a charging wake-up A+ signal to the BMS; When the BMS detects the charging wake-up A+ signal sent by the OBC, the main positive contactor and the main negative contactor in the high-voltage power battery are controlled to close, so that the AC power supply charges the high-voltage power battery; When charging is completed, the BMS controls the main positive contactor and the main negative contactor in the high-voltage power battery to be disconnected, so that the AC power supply stops charging the high-voltage power battery.

7. A charging system for a hybrid vehicle high-voltage power battery using the charging method for a hybrid vehicle high-voltage power battery as claimed in claim 1, characterized in that: include: A conversion charging device, which is used to connect to a charging pile or an AC power source; The output positive high-voltage line and the output negative high-voltage line of the high-voltage power battery are used to connect to the motor controller of the vehicle when the high-voltage power battery does not need to be charged, and to disconnect from the motor controller when the high-voltage power battery needs to be charged, and to connect to the conversion charging device to charge the high-voltage power battery through a charging pile or an AC power supply.

8. The charging system for the high-voltage power battery of a hybrid vehicle according to claim 7, characterized in that: Also includes: The low-voltage signal line of the BMS is used to connect with the low-voltage interface of the conversion charging device.

9. The charging system for the high-voltage power battery of a hybrid vehicle according to claim 7, characterized in that: When the conversion charging device is used to connect to a charging pile, the conversion charging device includes a charging gun insertion interface.

10. The charging system for a high-voltage power battery of a hybrid vehicle according to claim 7, characterized in that: When the conversion charging device is used to be connected to an AC power source, the conversion charging device includes an AC / DC conversion module AC / DC, an on-board charging module OBC and a charging plug.

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