WO2022068593A1 - 一种混合动力汽车的充电控制方法、装置以及汽车 - Google Patents

一种混合动力汽车的充电控制方法、装置以及汽车 Download PDF

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Publication number
WO2022068593A1
WO2022068593A1 PCT/CN2021/118564 CN2021118564W WO2022068593A1 WO 2022068593 A1 WO2022068593 A1 WO 2022068593A1 CN 2021118564 W CN2021118564 W CN 2021118564W WO 2022068593 A1 WO2022068593 A1 WO 2022068593A1
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Prior art keywords
charging
module
battery
voltage
obc
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PCT/CN2021/118564
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English (en)
French (fr)
Inventor
刘伟冬
王超
王兴辉
Original Assignee
比亚迪股份有限公司
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Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Priority to EP21874254.2A priority Critical patent/EP4207538A4/en
Priority to JP2023519631A priority patent/JP7469563B2/ja
Publication of WO2022068593A1 publication Critical patent/WO2022068593A1/zh
Priority to US18/121,943 priority patent/US20230226933A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B60L53/18—Cables specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/80—Time limits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Definitions

  • the present disclosure belongs to the field of electronic technology, and in particular, relates to a charging control method and device for a hybrid electric vehicle, and an automobile.
  • the power battery when charging a hybrid vehicle, the power battery is generally charged directly, and the power battery supplies power to the battery.
  • the battery may not meet the requirements.
  • the electricity demand of most low-voltage loads may lead to the failure of some functions of the whole vehicle, or even the whole vehicle may break down.
  • an object of the present disclosure is to provide a charging control method for a hybrid electric vehicle.
  • the method first charges the battery for a preset time period, and then charges the power battery, so as to avoid the failure of the function of the whole vehicle, and even prevent the whole vehicle from breaking down. .
  • the second purpose of the present disclosure is to provide a charging control device for a hybrid electric vehicle.
  • a third object of the present disclosure is to provide an automobile.
  • an embodiment of the first aspect of the present disclosure provides a charging control method for a hybrid electric vehicle.
  • the hybrid electric vehicle includes a charging port, an OBC module, a power battery, a DC module and a battery.
  • One end of the OBC module is Connected to the charging port, the other end of the OBC module is connected to the power battery and one end of the DC module respectively, and the other end of the DC module is connected to the battery;
  • the charging control method includes:
  • the connection between the OBC module and the power battery is disconnected, and the OBC module and the DC are connected the module charges the battery;
  • the connection between the OBC module and the power battery is turned on, and the power battery is charged through the OBC module.
  • a charging control device for a hybrid electric vehicle proposed by an embodiment of the second aspect of the present disclosure includes:
  • a memory connected to the processor, the memory for storing a computer program adapted for the processor to load and execute:
  • the connection between the OBC module and the power battery is disconnected, and the OBC module and the DC are connected the module charges the battery;
  • the connection between the OBC module and the power battery is turned on, and the power battery is charged through the OBC module.
  • an embodiment of the third aspect of the present disclosure provides an automobile, which includes the above-mentioned charging control device for a hybrid electric vehicle.
  • the storage battery when the voltages of the power battery and the storage battery are both low, the storage battery is charged for a preset period of time, and then the power battery is charged. Therefore, the storage battery can quickly reach the rated voltage, so that it can quickly respond to all low-voltage loads. It avoids the low-voltage load from being unable to start due to insufficient battery supply voltage, which leads to the failure of some functions of the whole vehicle, and even leads to the occurrence of the whole vehicle breaking down, thereby improving the functional safety of vehicle control.
  • FIG. 1 is a schematic structural diagram of a framework for implementing a charging control method provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a topology structure of an OBC module provided by an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a framework structure for implementing a charging control method provided by another embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of a charging control method according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic flowchart of charging in a constant voltage mode in a charging control method according to an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart of a regular boost in charging in the constant voltage mode of FIG. 5;
  • FIG. 7 is a schematic flowchart of charging in a constant current mode in a charging control method according to an embodiment of the present disclosure
  • FIG. 8 is a schematic flowchart of the allowable charging power acquisition during charging in the constant current mode of FIG. 7;
  • FIG. 9 is a schematic flowchart of a regular increase in current during charging in the constant current mode of FIG. 7;
  • FIG. 10 is a schematic flowchart of a charging control method according to another embodiment of the present disclosure.
  • the charging control system 1 includes a charging control device 10 and a charging device 11, the charging control device 10 is connected to the charging device 11, wherein the charging control device 10 includes a processor and a memory connected to each other, and the charging device 11 includes an OBC module 110, a DC module 112.
  • the OBC module 110 includes a PFC unit 1100 , a first capacitor C1 , an LLC unit 1101 and a second capacitor C2 connected in sequence, the PFC unit 1100 is connected to the charging The second capacitor C2 is connected to the precharge module 120 and the DC module 112 respectively.
  • the charging control device 10 is the core processing device of the charging control system 1 , and is used for receiving parameter information collected by the relevant components in the charging device 11 , performing analysis according to the parameter information, and analyzing the OBC module 110 and DC according to the analysis result.
  • the switch tube in the module 112 is controlled to realize the charging control of the power battery 111 and the storage battery 113 .
  • the charging control device 10 in this embodiment may be a controller or a control chip.
  • the charging control system 1 further includes a precharging module 120 , one end of the precharging module 120 is connected to the power battery 111 , and the other end of the precharging module 120 is connected to the power battery 111 .
  • One end is connected to the OBC module 110 and the DC module 112 respectively.
  • the precharging module 120 is used to realize the connection/disconnection between the OBC module 110 and the power battery 111 , and to realize the precharging of the power battery 111 .
  • the precharge module 120 includes a first switch, a second switch and a precharge resistor, the second switch and the precharge resistor are connected in series, and the second switch connected in series is connected to the precharge resistor The resistor is connected in parallel with the first switch;
  • the above is the hardware environment in which the charging control method of the present disclosure is implemented.
  • the above-mentioned hardware environment is not the only way to implement the technical solution of the present application. It can be dynamically adjusted according to hardware resources and charging requirements, such as: a processor And the memory is integrated into a control chip or a controller to improve the integration.
  • the charging control method of the present disclosure can be implemented based on the above-mentioned hardware environment.
  • the charging control method, charging control device, and automobile provided by the present disclosure will be described below with reference to the accompanying drawings.
  • FIG. 4 is a schematic flowchart of a charging control method according to an embodiment of the present application. As shown in Figure 4, the charging control method includes the following steps:
  • the voltage of the power battery and the storage battery are both low.
  • the present application can realize the disconnection and conduction of the OBC module and the power battery by arranging a switch module between the OBC module and the power battery.
  • the step of charging the battery through the OBC module and the DC module in the above embodiment includes:
  • Specific steps include:
  • the PFC unit in the process of starting and controlling the PFC unit to charge the first capacitor C1, in order to prevent the charging voltage of the first capacitor C1 from rising too fast, the instantaneous current flowing through the first capacitor C1 is too large, thereby causing The first capacitor C1 is damaged.
  • the PFC unit is controlled so that the charging voltage of the first capacitor C1 increases from the preset voltage to the third voltage threshold according to the preset slope, so as to avoid the phenomenon of excessive instantaneous current, thereby preventing the occurrence of excessive instantaneous current.
  • the charging safety is further improved.
  • the preset voltage in this embodiment may even be 0.
  • the steps of controlling the LLC unit in the above embodiment to charge the second capacitor C2 include:
  • S210 Control the LLC unit to charge the second capacitor C2 until the voltage of the second capacitor C2 reaches a preset voltage.
  • the LLC unit is first controlled to charge the second capacitor C2, so that the voltage of the second capacitor C2 quickly reaches the preset voltage, thereby improving the charging efficiency.
  • the charging voltage of the second capacitor C2 increases from the preset voltage to the fourth voltage threshold according to the preset slope, which avoids the phenomenon of excessive instantaneous current, thereby further improving the charging safety.
  • the LLC unit when the voltage of the first capacitor C1 is stable, the LLC unit is started and controlled to charge the second capacitor C2, and when the voltage of the second capacitor C2 is stable, the DC module is started and controlled to charge the battery, thereby avoiding the charging voltage of the battery The problem of too high, thus improving the charging safety of the battery.
  • the storage battery when the voltages of the power battery and the storage battery are both low, the storage battery is charged for a preset period of time, and then the power battery is charged. Therefore, the storage battery can quickly reach the rated voltage, so that it can quickly respond to the electricity demand of all low-voltage loads, avoiding the need for The low-voltage load cannot be started due to insufficient power supply voltage of the battery, which will lead to the failure of some functions of the whole vehicle, and even lead to the occurrence of the whole vehicle breaking down, thereby improving the functional safety of the vehicle control.
  • the step of charging the power battery through the OBC module in the above embodiment includes:
  • the power battery when charging the power battery, the power battery is charged with a large current, thereby shortening the charging time, not only improving the charging rate, but also meeting the charging requirements of the vehicle owner for fast charging.
  • the step of obtaining the allowable charging power in the above embodiment includes:
  • obtaining the allowable charging power of the cable is: obtaining the resistance of the AC charging device (for example, a charging gun), and obtaining the allowable current value according to the resistance and a preset standard table, for example, the preset standard table is that 100 ⁇ corresponds to 63A ; 220 ⁇ corresponds to 32A, 680 ⁇ corresponds to 16A, 1.5K ⁇ corresponds to 10A, and then calculates the allowable charging power Pcc of the cable according to the mains voltage and allowable current value.
  • the preset standard table is that 100 ⁇ corresponds to 63A ; 220 ⁇ corresponds to 32A, 680 ⁇ corresponds to 16A, 1.5K ⁇ corresponds to 10A
  • obtaining the allowable charging power of the battery is: receiving a BMS message to obtain the allowable charging power Pbms of the battery pack of the vehicle.
  • S302 determine the minimum value among the allowable charging power of the cable, the allowable charging power of the charging device, the allowable power of the charging pile, and the allowable charging power of the battery as the allowable charging power.
  • the minimum value of the allowable charging power of the cable, the allowable charging power of the charging device, the allowable power of the charging pile, and the allowable charging power of the battery is the allowable charging power, which will not exceed the maximum output power of all devices, thereby further improving the charging safety. sex.
  • the steps of controlling the OBC module in the above embodiment to increase the value of the charging current flowing to the power battery include:
  • S320 Control the OBC module so that the charging current value flowing to the power battery reaches a preset current value.
  • the OBC module is controlled first, so that the charging current flowing to the power battery quickly reaches the preset current value, thereby improving the charging efficiency.
  • the charging current flowing to the power battery increases from the preset current value to the target current value according to the preset slope, which avoids the phenomenon of excessive instantaneous current, thereby further improving the charging safety.
  • This embodiment controls the OBC module to enter the constant current mode, which not only improves the charging rate of the power battery, but also avoids the damage of the power battery and charging-related devices caused by the rapid increase of the charging current, thereby further improving the charging safety.
  • FIG. 10 is a schematic flowchart of a charging control method according to another embodiment of the present application. As shown in Figure 10, the charging control method includes the following steps:
  • Step S100 in this embodiment is the same as step S1 in the above-mentioned embodiment, and details are not repeated here.
  • the existing precharging module is reused to realize the disconnection or conduction of the OBC module and the power battery, which not only improves the integration of the charging device, but also does not need to add a switch module, thereby reducing the cost.
  • the step of disconnecting the OBC module and the power battery through the precharge module in the above embodiment specifically includes:
  • the first switch and the second switch are controlled to be disconnected, so as to disconnect the connection between the OBC module and the power battery.
  • the precharge module is reused to realize the conduction between the OBC module and the power battery, thereby improving the integration degree and reducing the cost.
  • the power battery is precharged through the precharge module, so that when the voltage of the power battery and the voltage of the second capacitor C2 are matched, a large current is used to charge the power battery, thereby The charging safety of the power battery is further improved.
  • connection between the OBC module and the power battery is conducted through the precharge module, and the steps of precharging the power battery through the OBC module and the precharge module specifically include: :
  • the second switch is controlled to be turned on and the first switch is kept turned off, so as to turn on the connection between the OBC module and the power battery, and precharge the power battery through the OBC module and the precharge resistor.
  • the precharge module is multiplexed to realize the conduction or disconnection of the OBC module and the power battery, thereby improving the integration degree.
  • a second aspect of the present disclosure provides a charging control device for a hybrid electric vehicle, which includes a processor and a memory, the processor is connected to the memory, and the memory is used for storing a computer program, and the computer program is suitable for the processor to load and execute:
  • the first voltage is less than the first voltage threshold and the second voltage is less than the second voltage threshold, disconnect the connection between the OBC module and the power battery, and charge the battery through the OBC module and the DC module;
  • the connection between the OBC module and the power battery is turned on, and the power battery is charged through the OBC module.
  • the hybrid electric vehicle further includes a precharge module, one end of the precharge module is connected to the OBC module and the DC module respectively, and the other end of the precharge module is connected to the power battery;
  • the processor is also used for: disconnecting the OBC module from the power battery through the pre-charging module;
  • the processor is also used for: conducting the connection between the OBC module and the power battery through the precharging module, and precharging the power battery through the OBC module and the precharging module.
  • the precharge module includes a first switch, a second switch and a precharge resistor, the second switch and the precharge resistor are connected in series, and the second switch and the precharge resistor connected in series are connected in parallel with the first switch;
  • the processor is also used to: control the disconnection of the first switch and the second switch to disconnect the OBC module from the power battery;
  • the processor is further configured to: control the second switch to be turned on and keep the first switch off, so as to turn on the connection between the OBC module and the power battery, and precharge the power battery through the OBC module and the precharge resistance.
  • the processor is further used to: control the OBC module to enter a constant voltage mode, and in the constant voltage mode, control the DC module to charge the battery.
  • the OBC module includes a PFC unit, a first capacitor, an LLC unit and a second capacitor connected in sequence, the PFC unit is connected to the charging port, and the second capacitor is respectively connected to the precharge module and the DC module;
  • the processor is also used to:
  • the OBC module When the voltage of the second capacitor reaches the fourth voltage threshold, it is determined that the OBC module enters the constant voltage mode, and starts and controls the DC module to charge the battery.
  • the processor is further configured to: control the LLC unit to charge the second capacitor until the voltage of the second capacitor reaches a preset voltage;
  • the LLC unit When the voltage of the second capacitor reaches the preset voltage, the LLC unit is controlled, so that the voltage of the second capacitor increases from the preset voltage to the fourth voltage threshold according to the preset slope.
  • the processor is also used to:
  • the processor is also used to:
  • the OBC module When the charging current value reaches the target current value, it is determined that the OBC module enters the constant current mode, and the power battery is charged by the current corresponding to the target current value.
  • the processor is also used to:
  • the processor is also used to:
  • the OBC module is controlled so that the charging current value increases from the preset current value to the target current value according to the preset slope.
  • a third aspect of the present disclosure provides an automobile, which includes the charging control device for a hybrid electric vehicle described in the above embodiments.

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Abstract

本申请公开了一种混合动力汽车的充电控制方法、装置以及汽车，其中，该充电控制方法包括：接收到充电指令时，获取动力电池的第一电压和蓄电池的第二电压；当第一电压小于第一电压阈值且第二电压小于第二电压阈值时，断开OBC模块与动力电池的连接，且通过OBC模块和DC模块给蓄电池充电；当蓄电池的充电时长达到预设时长时，导通OBC模块与动力电池的连接，且通过OBC模块给动力电池充电。

Description

一种混合动力汽车的充电控制方法、装置以及汽车
相关申请的交叉引用
本公开要求于2020年09月29日提交的申请号为202011056385.5，名称为“一种混合动力汽车的充电控制方法、装置以及汽车”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开属于电子技术领域，尤其涉及一种混合动力汽车的充电控制方法、装置以及汽车。
背景技术
目前，混合动力汽车充电时，一般是直接给动力电池充电，动力电池供电给蓄电池。
但是，当动力电池和蓄电池的电压均低时，基于动力电池不能过度放电的保护原则，混合动力汽车的DC模块则不会启动，进而动力电池不会给蓄电池供电，因此，蓄电池则可能不能满足大部分低压负载的用电需求，从而可能导致整车部分功能的失效，甚至可能出现整车抛锚。
公开内容
本公开旨在至少解决现有技术中存在的技术问题之一。为此，本公开的一个目的在于提供一种混合动力汽车的充电控制方法，该方法先给蓄电池充电预设时长，再给动力电池充电，避免了整车功能的失效，甚至避免了整车抛锚。
本公开的目的之二在于提出一种混合动力汽车的充电控制装置。
本公开的目的之三在于提供一种汽车。
为了解决上述问题，本公开第一方面实施例提供的一种混合动力汽车的充电控制方法，所述混合动力汽车包括充电口、OBC模块、动力电池、DC模块和蓄电池，所述OBC模块的一端与所述充电口连接，所述OBC模块的另一端分别与所述动力电池、所述DC模块的一端连接，所述DC模块的另一端与所述蓄电池连接；所述充电控制方法包括：
接收到充电指令时，获取所述动力电池的第一电压和所述蓄电池的第二电压；
当所述第一电压小于第一电压阈值且所述第二电压小于所述第二电压阈值时，断开所述OBC模块与所述动力电池的连接，且通过所述OBC模块和所述DC模块给所述蓄电池充电；
当所述蓄电池的充电时长达到预设时长时，导通所述OBC模块与所述动力电池的连接，且通过所述OBC模块给所述动力电池充电。
为了解决上述问题，本公开的第二方面实施例提出的一种混合动力汽车的充电控制装置，其包括：
处理器；以及，
存储器，其与所述处理器连接，所述存储器用于存储计算机程序，所述计算机程序适于所述处理器加载并执行：
接收到充电指令时，获取所述动力电池的第一电压和所述蓄电池的第二电压；
当所述第一电压小于第一电压阈值且所述第二电压小于所述第二电压阈值时，断开所述OBC模块与所述动力电池的连接，且通过所述OBC模块和所述DC模块给所述蓄电池充电；
当所述蓄电池的充电时长达到预设时长时，导通所述OBC模块与所述动力电池的连接，且通过所述OBC模块给所述动力电池充电。
为了解决上述问题，本公开的第三方面实施例提出的一种汽车，其包括上述的混合动力汽车的充电控制装置。
与现有技术相比，本申请当动力电池和蓄电池的电压均低时，先给蓄电池充电预设时长，再给动力电池充电，因此，蓄电池能快速达到额定电压，从而可以快速响应所有低压负载的用电需求，避免了低压负载因蓄电池供电电压不够导致的不能启动，从而导致整车部分功能失效，甚至导致出现整车抛锚现象的发生，进而提升了整车控制的功能安全性。
本公开的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本公开的实践了解到。
附图说明
本公开的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1为实施本公开一个实施例提供的充电控制方法的框架结构示意图；
图2为本公开实施例提供的OBC模块的拓扑结构示意图；
图3为实施本公开另一个实施例提供的充电控制方法的框架结构示意图；
图4为本公开一实施例充电控制方法的流程示意图；
图5为本公开实施例充电控制方法中恒压模式下充电的流程示意图；
图6为图5恒压模式下充电中有规律升压的流程示意图；
图7为本公开实施例充电控制方法中恒流模式下充电的流程示意图；
图8为图7恒流模式下充电中允许充电功率获取的流程示意图；
图9为图7恒流模式下充电中有规律增大电流的流程示意图；
图10为本公开另一实施例充电控制方法的流程示意图。
具体实施方式
下面详细描述本公开的实施例，参考附图描述的实施例是示例性的，下面详细描述本公开的实施例。
当本公开提供的充电控制方法应用于混合动力汽车的充电控制时，本公开所提供的充电控制方法可以在如图1所示的充电控制系统1中实施。该充电控制系统1包括充电控制装置10和充电装置11，充电控制装置10与充电装置11连接，其中，充电控制装置10包括相互连接的处理器和存储器，充电装置11包括OBC模块110、DC模块112、动力电池111和蓄电池113，OBC模块110的一端外接充电口，OBC模块110的另一端分别与动力电池111、DC模块112的一端连接，DC模块112的另一端与蓄电池113连接。
在本实施例的基础上，其他实施例中，如图2所示，该OBC模块110包括依次连接的PFC单元1100、第一电容C1、LLC单元1101和第二电容C2，PFC单元1100与充电口连接，第二电容C2分别与预充模块120、DC模块112连接。
该充电控制装置10为充电控制系统1的核心处理设备，其用于接收充电装置11中相关部件被采集的参数信息，并根据该参数信息进行分析，以及根据分析结果对对OBC模块110和DC模块112中的开关管进行控制，以实现动力电池111和蓄电池113的充电控制。需要说明的是，本实施例中的充电控制装置10可以为控制器，也可以为控制芯片。
在其他实施例中，上述实施例的基础上，如图3所示，该充电控制系统1还包括预充模块120，该预充模块120一端与动力电池111连接，该预充模块120的另一端分别与OBC模块110、DC模块112连接。该预充模块120用于实现OBC模块110与动力电池111的之间导通/断开，以及实现对动力电池111的预充。
在本实施例的基础上，其他实施例中，该预充模块120包括第一开关、第二开关和预充电阻，第二开关和预充电阻串联，且串联后的第二开关和预充电阻与第一开关并联；
以上是本公开充电控制方法实施的硬件环境，但是，需要注意的时，上述硬件环境 并不是执行本申请技术方案的唯一方式，其可以根据硬件资源、以及充电需求进行动态调整，例如：处理器和存储器集成为一个控制芯片或一个控制器，以提高集成度。
即，本公开的充电控制方法可以基于上述的硬件环境来进行实施，以下将结合附图来介绍本公开提供的充电控制方法、充电控制装置以及汽车。
实施例一
图4是本申请一个实施例充电控制方法的流程示意图。如图4所示，该充电控制方法包括如下步骤：
S1，接收到充电指令时，获取动力电池的第一电压和蓄电池的第二电压。
在本实施例中，当检测到充电桩上充电枪插入汽车的充电口时，则会接收到充电指令。
S2，当第一电压小于第一电压阈值且第二电压小于第二电压阈值时，断开OBC模块与动力电池的连接，且通过OBC模块和DC模块给蓄电池充电。
在本实施例中，当混合动力汽车在动力电池低电量的情况下，将混合动力汽车停在停车场，且长时间未使用时，则会出现动力电池和蓄电池的电压均低的工况。
在本实施例中，本申请可以通过在OBC模块与动力电池之间设置一个开关模块，以实现OBC模块与动力电池的断开与导通。
由于蓄电池的电容量远远小于动力电池的电容量，所以，若采用动力电池的快充策略给蓄电池充电，则可能会因为充电电压和/或充电电流过大导致蓄电池损坏，甚至可能导致整个充电装置故障。为此，为了确保蓄电池的充电安全性，在上述实施例的基础上，其他实施例中，上述实施例中的通过OBC模块和DC模块给蓄电池充电的步骤，包括：
控制OBC模块进入恒压模式，并在恒压模式下，控制DC模块，给蓄电池充电。
在上述实施例的基础上，其他实施例中，如图5所示，具体给出了上述实施例中控制OBC模块进入恒压模式，并在恒压模式下，控制DC模块，给蓄电池充电的具体步骤，包括：
S20，启动并控制PFC单元，以为第一电容C1充电。
在本实施例中，启动并控制PFC单元，为第一电容C1充电的过程中，为了避免第一电容C1的充电电压提升过快，导致流经第一电容C1的瞬时电流过大，从而导致第一电容C1出现损坏，为此，本案通过控制PFC单元，以致第一电容C1的充电电压从预设电压按照预设斜率增长到第三电压阈值，避免了瞬时电流过大的现象发生，从而进一步提升了充电安全性。
需要说明的，本实施例中的预设电压甚至可以为0。
S21，当第一电容C1的电压达到第三电压阈值时，启动并控制LLC单元，以为第二电容C2充电。
在本实施例中，启动并控制LLC单元，为第二电容C2充电的过程中，为了避免第二电容C2的充电电压提升过快，导致流经第二电容C2的瞬时电流过大，从而导致第二电容C2出现损坏，为此，在本实施例的基础上，其他实施例中，如图6所示，上述实施例中的控制LLC单元，以为第二电容C2充电的步骤，包括：
S210，控制LLC单元，以为第二电容C2充电，直至第二电容C2的电压达到预设电压。
在本实施例中，先通过控制LLC单元，以为第二电容C2充电，使得第二电容C2的电压快速达到预设电压，从而提升了充电效率。
S211，当第二电容C2的电压达到预设电压时，控制LLC单元，以致第二电容C2的电压从预设电压按照预设斜率提升至第四电压阈值。
在本实施例中，第二电容C2的充电电压从预设电压按照预设斜率增长到第四电压阈值，避免了瞬时电流过大的现象发生，从而进一步提升了充电安全性。
S22，当第二电容C2的电压达到第四电压阈值时，则判定OBC模块进入恒压模式，且启动并控制DC模块，给蓄电池充电。
本实施例在第一电容C1的电压稳定时，启动并控制LLC单元给第二电容C2充电，在第二电容C2的电压稳定时，启动并控制DC模块给蓄电池充电，避免了蓄电池的充电电压过高的问题，从而提升了蓄电池的充电安全性。
S3，当蓄电池的充电时长达到预设时长时，导通OBC模块与动力电池的连接，且通过OBC模块给动力电池充电。
本申请当动力电池和蓄电池的电压均低时，先给蓄电池充电预设时长，再给动力电池充电，因此，蓄电池能快速达到额定电压，从而可以快速响应所有低压负载的用电需求，避免了低压负载因蓄电池供电电压不够导致的不能启动，从而导致整车部分功能失效，甚至导致出现整车抛锚现象的发生，进而提升了整车控制的功能安全性。
由于动力电池的电容量较大，所以为了满足大部分车主的需求，需要缩短动力电池的充电时长，为此，为了提升动力电池的充电速率，在本实施例的基础上，其他实施例中，上述实施例中的通过OBC模块给动力电池充电的步骤，包括：
控制OBC模块进入恒流模式并在恒流模式下，给动力电池充电。
本实施例当给动力电池充电时，通过大电流给动力电池充电，从而缩短了充电时长， 既提升了充电速率，也满足了车主快充的充电需求。
在本实施例的基础上，其他实施例中，如图7所示，给出了上述实施例中的控制OBC模块进入恒流模式并在恒流模式下，给动力电池充电的具体步骤，包括：
S30，获取允许充电功率。
动力电池的充电功率既受限于自身，也受限于充电装置，甚至受限于充电桩等等，需要综合进行考虑，为此，在本实施例的基础上，其他实施例中，如图8所示，上述实施例中的获取允许充电功率的步骤，包括：
S301，获取线缆允许充电功率、充电装置允许充电功率、充电桩允许功率、以及电池允许充电功率。
在本实施方式中，获取线缆允许充电功率为：获取交流充电设备(例如，充电枪)的电阻，并根据电阻和预设标准表得到允许电流值，例如，预设标准表为100Ω对应63A；220Ω对应32A，680Ω对应16A，1.5KΩ对应10A，再根据市电电压和允许电流值计算得到线缆的允许充电功率Pcc。
在本实施方式中，获取充电装置允许充电功率为：根据国标GBT 18487.1-2015标准要求，获取充电控制信号PWM，并分析PWM得到占空比D；根据占空比和预设标准表得到允许电流，例如，D＜8％时不允许充电，8％≤D＜10％时允许电流Imax＝6，10％≤D＜85％时允许电流Imax＝D*100*0.6，85％≤D＜90％时允许电流Imax＝(D*100-64)*2.5且Imax≤63，90％≤D时不允许充电，再根据市电电压和允许电流计算得到Pcp。
在本实施方式中，获取充电桩允许功率为：获取交流侧电网电压和交流侧电流即电网电流，根据功率P＝U*I，计算当前充电功率Pn。
在本实施方式中，获取电池允许充电功率为：接收BMS报文获取整车电池包允许充电功率Pbms。
S302，确定线缆允许充电功率、充电装置允许充电功率、充电桩允许功率、电池允许充电功率中最小值为允许充电功率。
本实施例通过选择线缆允许充电功率、充电装置允许充电功率、充电桩允许功率、电池允许充电功率中最小值为允许充电功率，不会超过所有器件的最大输出功率，从而进一步提升了充电安全性。
S31，根据允许充电功率确定目标电流值。
S32，控制OBC模块，以增大流向动力电池的充电电流值。
在本实施例中，控制OBC模块，为动力电池充电的过程中，为了避免动力电池的充电电流提升过快，导致动力电池损坏，甚至导致相关器件损坏，为此，在本实施例的基 础上，其他实施例中，如图9所示，上述实施例中的控制OBC模块，以增大流向动力电池的充电电流值的步骤，包括：
S320，控制OBC模块，以致流向动力电池的充电电流值达到预设电流值。
在本实施例中，先通过控制OBC模块，使得流向动力电池的充电电流快速达到预设电流值，从而提升了充电效率。
S321，当充电电流值达到预设电流值时，控制OBC模块，以致充电电流值从预设电流值按照预设斜率增长至目标电流值。
在本实施例中，流向动力电池的充电电流从预设电流值按照预设斜率增长到目标电流值，避免了瞬时电流过大的现象发生，从而进一步提升了充电安全性。
S33，当充电电流值达到目标电流值时，则判断OBC模块进入恒流模式，并通过与目标电流值对应的电流为动力电池充电。
本实施例通过控制OBC模块进入恒流模式，既提升了动力电池的充电速率，也避免了充电电流提升过快，导致的动力电池和充电相关器件损坏，从而提升了进一步提升了充电安全性。
实施例二
图10是本申请另一个实施例充电控制方法的流程示意图。如图10所示，该充电控制方法包括如下步骤：
S100，接收到充电指令时，获取动力电池的第一电压和蓄电池的第二电压。
本实施例的步骤S100与上述实施例的步骤S1相同，在此不再赘述。
S101，当第一电压小于第一电压阈值且第二电压小于第二电压阈值时，通过预充模块断开OBC模块与动力电池的连接，且通过OBC模块和DC模块给蓄电池充电。
本实施例通过复用已有的预充模块，以实现OBC模块与动力电池的断开或导通，既提升了充电装置的集成度，也无需增设开关模块，从而降低了成本。
在上述实施例的基础上，其他实施例中，上述实施例中的通过预充模块断开OBC模块与动力电池的连接的步骤，具体包括：
控制第一开关和第二开关断开，以断开OBC模块与动力电池的连接。
S102，当蓄电池的充电时长达到预设时长时，通过预充模块导通OBC模块与动力电池的连接，且通过OBC模块和预充模块对动力电池进行预充，以及通过OBC模块给动力电池充电。
本实施例既复用预充模块实现OBC模块与动力电池导通，从而提升了集成度和降低了成本。与此同时，在对动力电池充电前，通过预充模块对动力电池进行预充，致使动 力电池的电压与第二电容C2的电压两者适配时，才采用大电流给动力电池充电，从而进一步提升了动力电池的充电安全性。
在上述实施例的基础上，其他实施例中，上述实施例中通过预充模块导通OBC模块与动力电池的连接，且通过OBC模块和预充模块对动力电池进行预充的步骤，具体包括：
控制第二开关导通且保持第一开关断开，以导通OBC模块与动力电池的连接，且通过OBC模块和预充电阻对动力电池进行预充。
本申请当动力电池和蓄电池的电压均低时，先给蓄电池充电预设时长，再给动力电池充电，因此，蓄电池能快速达到额定电压，从而可以快速响应所有低压负载的用电需求，避免了低压负载因蓄电池供电电压不够导致的不能启动，从而导致整车部分功能失效，甚至导致出现整车抛锚现象的发生，进而提升了整车控制的功能安全性。此外，本实施例复用预充模块，以实现OBC模块与动力电池的导通或断开，从而提升了集成度。
本公开第二方面提出了一种混合动力汽车的充电控制装置，其包括处理器和存储器，该处理器与存储器连接，存储器用于存储计算机程序，计算机程序适于处理器加载并执行：
接收到充电指令时，获取动力电池的第一电压和蓄电池的第二电压；
当第一电压小于第一电压阈值且第二电压小于第二电压阈值时，断开OBC模块与动力电池的连接，且通过OBC模块和DC模块给蓄电池充电；
当蓄电池的充电时长达到预设时长时，导通OBC模块与动力电池的连接，且通过OBC模块给动力电池充电。
可选的，混合动力汽车还包括预充模块，预充模块一端分别与OBC模块、DC模块连接，预充模块另一端与动力电池连接；
该处理器还用于：通过预充模块断开OBC模块与动力电池的连接；
该处理器还用于：通过预充模块导通OBC模块与动力电池的连接，且通过OBC模块和预充模块对动力电池进行预充。
可选的，预充模块包括第一开关、第二开关和预充电阻，第二开关和预充电阻串联，且串联后的第二开关和预充电阻与第一开关并联；
该处理器还用于：控制第一开关和第二开关断开，以断开OBC模块与动力电池的连接；
该处理器还用于：控制第二开关导通且保持第一开关断开，以导通OBC模块与动力电池的连接，且通过OBC模块和预充电阻对动力电池进行预充。
可选的，该处理器还用于：控制OBC模块进入恒压模式，并在恒压模式下，控制DC 模块，给蓄电池充电。
可选的，OBC模块包括依次连接的PFC单元、第一电容、LLC单元和第二电容，PFC单元与充电口连接，第二电容分别与预充模块、DC模块连接；
该处理器还用于：
启动并控制PFC单元，以为第一电容充电；
当第一电容的电压达到第三电压阈值时，启动并控制LLC单元，以为第二电容充电；
当第二电容的电压达到第四电压阈值时，则判定OBC模块进入恒压模式，且启动并控制DC模块，给蓄电池充电。
可选的，该处理器还用于：控制LLC单元，以为第二电容充电，直至第二电容的电压达到预设电压；
当第二电容的电压达到预设电压时，控制LLC单元，以致第二电容的电压从预设电压按照预设斜率提升至第四电压阈值。
可选的，该处理器还用于：
控制OBC模块进入恒流模式并在恒流模式下，给动力电池充电。
可选的，该处理器还用于：
获取允许充电功率；
根据允许充电功率确定目标电流值；
控制OBC模块，以增大流向动力电池的充电电流值；
当充电电流值达到目标电流值时，则判断OBC模块进入恒流模式，并通过与目标电流值对应的电流为动力电池充电。
可选的，该处理器还用于：
获取线缆允许充电功率、充电装置允许充电功率、充电桩允许功率、以及电池允许充电功率；
确定线缆允许充电功率、充电装置允许充电功率、充电桩允许功率、电池允许充电功率中最小值为允许充电功率。
可选的，该处理器还用于：
控制OBC模块，以致流向动力电池的充电电流值达到预设电流值；
当充电电流值达到预设电流值时，控制OBC模块，以致充电电流值从预设电流值按照预设斜率增长至目标电流值。
本公开实施例提供的充电控制装置的具体原理和实现方式均与上述实施例类似，此处不再赘述。
本公开第三方面提出了一种汽车，其包括上述实施例描述的混合动力汽车的充电控制装置。
本公开实施例提供的充电控制装置的具体原理和实现方式均与上述实施例类似，此处不再赘述。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
在本公开的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本公开中的具体含义。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。
尽管已经示出和描述了本公开的实施例，本领域的普通技术人员可以理解：在不脱离本公开的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本公开的范围由权利要求及其等同物限定。

Claims (12)

  1. 一种混合动力汽车的充电控制方法，其特征在于，所述混合动力汽车包括充电口、OBC模块、动力电池、DC模块和蓄电池，所述OBC模块的一端与所述充电口连接，所述OBC模块的另一端分别与所述动力电池、所述DC模块的一端连接，所述DC模块的另一端与所述蓄电池连接；所述充电控制方法包括：
    接收到充电指令时，获取所述动力电池的第一电压和所述蓄电池的第二电压；
    当所述第一电压小于第一电压阈值且所述第二电压小于所述第二电压阈值时，断开所述OBC模块与所述动力电池的连接，且通过所述OBC模块和所述DC模块给所述蓄电池充电；
    当所述蓄电池的充电时长达到预设时长时，导通所述OBC模块与所述动力电池的连接，且通过所述OBC模块给所述动力电池充电。
  2. 根据权利要求1所述的混合动力汽车的充电控制方法，其特征在于，所述混合动力汽车还包括预充模块，所述预充模块一端分别与所述OBC模块、所述DC模块连接，所述预充模块另一端与所述动力电池连接；
    所述断开所述OBC模块与所述动力电池的连接的步骤，包括：
    通过所述预充模块断开所述OBC模块与所述动力电池的连接；
    所述导通所述OBC模块与所述动力电池的连接的步骤，包括：
    通过所述预充模块导通所述OBC模块与所述动力电池的连接，且通过所述OBC模块和所述预充模块对所述动力电池进行预充。
  3. 根据权利要求2所述的混合动力汽车的充电控制方法，其特征在于，所述预充模块包括第一开关、第二开关和预充电阻，所述第二开关和所述预充电阻串联，且串联后的第二开关和预充电阻与所述第一开关并联；
    所述通过所述预充模块断开所述OBC模块与所述动力电池的连接的步骤，包括：
    控制所述第一开关和所述第二开关断开，以断开所述OBC模块与所述动力电池的连接；
    所述通过所述预充模块导通所述OBC模块与所述动力电池的连接，且通过所述OBC模块和所述预充模块对所述动力电池进行预充的步骤，包括：
    控制所述第二开关导通且保持所述第一开关断开，以导通所述OBC模块与所述动力 电池的连接，且通过所述OBC模块和所述预充电阻对所述动力电池进行预充。
  4. 根据权利要求2所述的混合动力汽车的充电控制方法，其特征在于，所述通过所述OBC模块和所述DC模块给所述蓄电池充电的步骤，包括：
    控制所述OBC模块进入恒压模式，并在所述恒压模式下，控制所述DC模块，给所述蓄电池充电。
  5. 根据权利要求4所述的混合动力汽车的充电控制方法，其特征在于，所述OBC模块包括依次连接的PFC单元、第一电容、LLC单元和第二电容，所述PFC单元与所述充电口连接，所述第二电容分别与所述预充模块、所述DC模块连接；
    所述控制所述OBC模块进入恒压模式，并在所述恒压模式下，控制所述DC模块，给所述蓄电池充电的步骤，包括：
    启动并控制所述PFC单元，以为所述第一电容充电；
    当所述第一电容的电压达到第三电压阈值时，启动并控制所述LLC单元，以为所述第二电容充电；
    当所述第二电容的电压达到第四电压阈值时，则判定所述OBC模块进入恒压模式，且启动并控制所述DC模块，给所述蓄电池充电。
  6. 根据权利要求5所述的混合动力汽车的充电控制方法，其特征在于，所述控制所述LLC单元，以为所述第二电容充电的步骤，包括：
    控制所述LLC单元，以为所述第二电容充电，直至所述第二电容的电压达到预设电压；
    当所述第二电容的电压达到所述预设电压时，控制所述LLC单元，以致所述第二电容的电压从所述预设电压按照预设斜率提升至所述第四电压阈值。
  7. 根据权利要求1所述的混合动力汽车的充电控制方法，其特征在于，所述通过所述OBC模块给所述动力电池充电的步骤，包括：
    控制所述OBC模块进入恒流模式并在所述恒流模式下，给所述动力电池充电。
  8. 根据权利要求7所述的混合动力汽车的充电控制方法，其特征在于，
    所述控制所述OBC模块进入恒流模式并在所述恒流模式下，给所述动力电池充电的 步骤，包括：
    获取允许充电功率；
    根据所述允许充电功率确定目标电流值；
    控制所述OBC模块，以增大流向所述动力电池的充电电流值；
    当所述充电电流值达到所述目标电流值时，则判断所述OBC模块进入恒流模式，并通过与所述目标电流值对应的电流为所述动力电池充电。
  9. 根据权利要求8所述的混合动力汽车的充电控制方法，其特征在于，所述获取允许充电功率的步骤，包括：
    获取线缆允许充电功率、充电装置允许充电功率、充电桩允许功率、以及电池允许充电功率；
    确定所述线缆允许充电功率、所述充电装置允许充电功率、所述充电桩允许功率、所述电池允许充电功率中最小值为所述允许充电功率。
  10. 根据权利要求8所述的混合动力汽车的充电控制方法，其特征在于，所述控制所述OBC模块，以增大流向所述动力电池的充电电流值的步骤，包括：
    控制所述OBC模块，以致流向所述动力电池的充电电流值达到预设电流值；
    当充电电流值达到所述预设电流值时，控制所述OBC模块，以致充电电流值从所述预设电流值按照预设斜率增长至所述目标电流值。
  11. 一种混合动力汽车的充电控制装置，其特征在于，其包括：
    处理器；以及，
    存储器，其与所述处理器连接，所述存储器用于存储计算机程序，所述计算机程序适于所述处理器加载并执行：
    接收到充电指令时，获取动力电池的第一电压和蓄电池的第二电压；
    当所述第一电压小于第一电压阈值且所述第二电压小于所述第二电压阈值时，断开OBC模块与所述动力电池的连接，且通过所述OBC模块和DC模块给所述蓄电池充电；
    当所述蓄电池的充电时长达到预设时长时，导通所述OBC模块与所述动力电池的连接，且通过所述OBC模块给所述动力电池充电。
  12. 一种汽车，其特征在于，其包括权利要求10所述的混合动力汽车的充电控制 装置。
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