WO2009129685A1 - 一种汽车用双电压dc/dc转换装置 - Google Patents

一种汽车用双电压dc/dc转换装置 Download PDF

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Publication number
WO2009129685A1
WO2009129685A1 PCT/CN2008/073681 CN2008073681W WO2009129685A1 WO 2009129685 A1 WO2009129685 A1 WO 2009129685A1 CN 2008073681 W CN2008073681 W CN 2008073681W WO 2009129685 A1 WO2009129685 A1 WO 2009129685A1
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control unit
voltage
signal
conversion
converter
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French (fr)
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顾伟
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Chery Automobile Co Ltd
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Chery Automobile Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
    • H02M3/3376—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
    • H02M3/3378—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type

Definitions

  • the invention relates to the technical field of automobile control, and in particular to a dual voltage DC/DC conversion device for automobiles.
  • the upgrade from a traditional 12V power supply system to a 42V power supply system is a transitional process that cannot be achieved in one step. This is because although there are many electrical devices that are suitable for using 42V, there are a few that are not currently suitable for use. If all the electrical equipment is changed to 42V voltage supply, the original electrical equipment will be completely eliminated, resulting in huge waste. Therefore, in the process of this transition, a two-voltage power supply system came into being.
  • An object of the present invention is to provide a dual voltage DC/DC converter for a vehicle that can convert between a 42V system and a 12V system, so that the vehicle electrical appliance can select a power supply system as needed.
  • the invention provides a dual voltage DC/DC converter device for automobile, comprising a DC/DC conversion single a DC/DC conversion unit and the control unit constitute a DC/DC conversion system; the body controller transmits a voltage setting signal and a DC/ according to a vehicle load condition and a battery condition. a DC conversion enable signal to the control unit; the control unit controls the DC/DC conversion unit output voltage.
  • the input/output voltage signal, the current signal and the temperature signal of the DC/DC conversion unit are transmitted to the control unit; the control unit detects the voltage signal, the current signal and the temperature signal; and DC/ An output current signal of the DC conversion unit and a status signal of the DC/DC conversion system are transmitted to the body controller for detection.
  • control unit compares a temperature signal of the DC/DC conversion unit with a set threshold temperature; if greater than the threshold temperature, shields a chip of the control unit from operating on the DC /DC conversion system for protection.
  • control unit compares an input voltage signal of the DC/DC conversion unit with a set input threshold voltage; if the input threshold voltage is greater than, the chip of the control unit is shielded, The DC/DC conversion system is protected.
  • control unit compares an input current signal of the DC/DC conversion unit with a set threshold current, and if greater than the threshold current, shields a chip operation of the control unit, The DC/DC conversion system is protected.
  • control unit compares an output voltage of the DC/DC conversion unit with a set output threshold voltage, and if it is greater than the output threshold voltage, blocks a chip operation of the control unit, The DC/DC conversion system is protected.
  • control unit compares an output current of the DC/DC conversion unit with a set output current threshold, and if greater than the output current threshold, the chip of the shielding control unit operates, for the DC /DC conversion system for protection.
  • the DC/DC conversion unit is composed of a transformer, a rectifier circuit and a filter circuit, and the input voltage signal is transformed by the transformer, and then filtered by a rectifier circuit rectification and filtering circuit; and the input end of the conversion unit A current sensor is provided at each of the output terminals.
  • the output signal of the control unit is driven and controlled by the DC/DC conversion unit after being amplified and filtered.
  • the means of cooling of the device is water cooled.
  • the invention has the beneficial effects:
  • the present invention provides a DC/DC converter capable of converting a 42V system voltage to a 12V system voltage to provide a voltage to a 12V system load. This can meet the needs of different power supply systems for different loads, and meet the needs of the entire vehicle.
  • Figure 1 is a schematic diagram of a dual voltage DC/DC converter
  • FIG. 2 is a structural diagram of a control unit and a conversion unit in a dual voltage DC/DC converter
  • FIG. 3 is a schematic diagram of a structure of an internal conversion unit of a dual voltage DC/DC converter
  • Figure 4 is a schematic diagram showing the structure of the internal control unit of the dual voltage DC/DC converter.
  • FIG. 1 there is shown a schematic diagram of a dual voltage DC/DC converter based on the present invention.
  • the dual voltage DC/DC converter for automobiles provided by the present invention includes a DC/DC conversion unit 103, a control unit 102, and a Hybrid Control Unit (HCU) 101.
  • a DC/DC conversion unit 103 DC/DC conversion unit 103
  • a control unit 102 control unit 102
  • a Hybrid Control Unit (HCU) 101 Hybrid Control Unit
  • the DC/DC conversion unit 103 and the control unit 102 constitute a DC/DC conversion system.
  • the body controller 101 transmits a voltage setting signal and a DC/DC conversion enable signal to the control unit 102 in accordance with the vehicle load condition and the condition of the battery.
  • the control unit 102 controls the DC/DC conversion unit 103 to output a voltage.
  • FIG. 2 there is shown an interface diagram of a control unit and a conversion unit in a dual voltage DC/DC converter based on the present invention.
  • the temperature signal of the DC/DC converting unit 103, and the input voltage signal and current signal and the output voltage signal and current signal are transmitted to the control unit 102.
  • the control unit 102 detects the respective signals and transmits the voltage signal and current signal output from the conversion unit 103, and the status signal (DCDC_OK) of the DC/DC conversion system to the HCU 101 for detection.
  • the control unit 102 compares the temperature signal of the conversion unit 101 with a set threshold temperature (typically 90 ° C). If the temperature is greater than the set threshold temperature, the chip operation of the control unit 102 is shielded to protect the DC/DC conversion system.
  • the control unit 102 compares the voltage signal input by the conversion unit 101 with a set input threshold voltage (typically 58V). If the voltage is greater than the set input threshold voltage, the chip operation of the control unit 102 is shielded to protect the DC/DC conversion system.
  • the control unit 102 compares the current signal input by the conversion unit 101 with a set input threshold current, and if the current is greater than the set input threshold current, blocks the chip operation of the control unit 102, Protect the DC/DC converter system.
  • the control unit 102 compares the voltage output by the conversion unit 103 with the set output threshold voltage. If the voltage is greater than the set output threshold voltage, the chip of the control unit 102 is shielded. The DC/DC conversion system is protected.
  • the control unit 102 compares the current output by the conversion unit 103 with the set output threshold current. If the voltage is greater than the set output threshold current, the chip of the control unit 102 is shielded. The DC/DC conversion system is protected.
  • the input signal input by the conversion unit 103 to the control unit 102 includes an input current signal, an input voltage signal, an output current signal, an output voltage signal, and a temperature signal of the conversion unit.
  • the control unit 102 processes the input signal and outputs a control signal to the conversion unit 103, and controls the conversion unit 103 to output a required voltage.
  • FIG. 3 there is shown a schematic diagram of the structure of a conversion unit in a dual voltage DC/DC converter based on the present invention.
  • the DC/DC conversion unit is composed of a transformer T, a rectifier circuit and a filter circuit.
  • the rectifier circuit is composed of diodes D1 and D2; the filter circuit is composed of an inductor L3 and a capacitor C1.
  • the input voltage signal is transformed by the transformer ,, and then filtered by the rectifier circuit rectification and filtering circuit.
  • the L1 and L2 are respectively used to detect currents at the input and output of the conversion unit; the current is sent to the control unit.
  • FIG. 4 there is shown a schematic diagram of the structure of a control unit in a dual voltage DC/DC converter based on the present invention.
  • the DC/DC conversion unit 103 After the output signal of the control unit 102 is driven by the driving circuit U3, the DC/DC conversion unit 103 for drive control.
  • the drive circuit U3 includes amplification circuit amplification and filter circuit filtering.
  • the output signal of the control unit 102 is sent to the HCU 101.
  • the output signal includes a current signal and an operational status signal.
  • the HCU 101 determines whether the DC/DC conversion system is too low or too high by the current signal, and performs software protection when the current exceeds a predetermined standard.
  • the HCU 101 determines whether the DC/DC conversion system works normally by the working status signal.
  • the cooling method of the DC/DC converter system is water-cooled, and the cooling system and the whole vehicle share a cooling system, and the modification of the whole vehicle is small.
  • the DC/DC converter system can be integrated with the body controller or with the body controller. When it is a separate component, it communicates with the body harness and the body controller. As an integrated component, it can be connected via an internal connector. Communication connection.
  • the input voltage of the DC/DC converter system is 42 V.
  • the input voltage can be directly used as the supply voltage of the 42V power supply on the one hand, and the input voltage of the DC/DC conversion system on the other hand, and converted into 12V voltage by the DC/DC conversion system to supply the 12V electrical system.
  • This DC/DC converter system has an output voltage range of 12V electrical system.
  • the switching unit and the control unit inside the DC/DC conversion system are electrically isolated to prevent the high-frequency interference signal of the conversion unit from affecting the control unit, thereby ensuring better system stability.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Description

一种汽车用双电压 DC/DC转换装置
本申请要求于 2008 年 4 月 25 日提交中国专利局、 申请号为 200810089268.1、 发明名称为"一种汽车用双电压 DC/DC转换装置"的中国专 利申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及汽车控制技术领域，尤其涉及一种汽车用双电压 DC/DC转 换装置。
背景技术
随着汽车产品质量的不断提高， 越来越多的汽车电子、 电器被应用到 汽车领域， 由此而带来了汽车电负荷的大大提高。 据预测， 未来汽车供电 系统的电功率将从目前的约 3KW提高到近 10KW。 而传统的 12V供电系 统的供电能力明显不足， 另一方面， 根据电功率等于电流与电压的乘积这 一基本物理公式得知： 在输入功率不变的情况下，电压提高一倍， 则电流可 相应地减少 1/2。 电流减少以后， 就可以减少线束和电器设备的尺寸、 质量 以及电能损耗， 同时还有利于控制装置的小型化和集成化， 因而通过提高 电压等级来提高供电系统的电容量已经成为行业的趋势。
目前， 欧洲和美国的汽车制造商、 零部件供应商一致认为汽车供电系 统的电压等级升至 42V最适宜， 既经济又安全。
从传统的 12V供电系统提升为 42V供电系统是一个过渡的过程， 不可 能一步到位。 这是因为虽然有许多电器设备适合釆用 42V电压， 但也有少 量目前还不适宜釆用。 若把所有的电器设备全部改为 42V电压供电会使原 有的电器设备全部被淘汰， 从而产生巨大的浪费。 因此， 在此过渡的过程 中， 双电压供电系统应运而生。
发明内容
本发明的发明目的在于提供一种汽车用双电压 DC/DC转换装置，能够 实现 42V系统与 12V系统之间的转换，以使汽车用电器可以根据需要选择 供电系统。
实现本发明的技术方案：
本发明提供一种汽车用双电压 DC/DC转换装置， 包括 DC/DC转换单 元、 控制单元和车身控制器； 所述 DC/DC转换单元和所述控制单元构成 DC/DC转换系统； 所述车身控制器根据整车负载状况以及电池的状况， 发 送电压设置信号和 DC/DC转换使能信号至所述控制单元； 所述控制单元控 制所述 DC/DC转换单元输出电压。
优选地， 所述 DC/DC转换单元的输入输出电压信号、 电流信号和温度 信号传送到所述控制单元； 所述控制单元对所述电压信号、 电流信号和温 度信号进行检测； 并将 DC/DC转换单元的输出电流信号和 DC/DC转换系 统的状态信号传送到所述车身控制器以供检测。
优选地，所述控制单元将所述 DC/DC转换单元的温度信号与设定的阀 值温度进行比较； 若大于所述阀值温度， 则屏蔽所述控制单元的芯片工作， 对所述 DC/DC转换系统进行保护。
优选地，所述控制单元将所述 DC/DC转换单元的输入电压信号与设定 的输入阀值电压进行比较； 若大于所述输入阀值电压， 则屏蔽所述控制单 元的芯片工作， 对所述 DC/DC转换系统进行保护。
优选地，所述控制单元将所述 DC/DC转换单元的输入电流信号与设定 的阀值电流进行比较， 若大于所述阀值电流， 则屏蔽所述控制单元的芯片 工作， 对所述 DC/DC转换系统进行保护。
优选地，所述控制单元将所述 DC/DC转换单元的输出电压与设定的输 出阀值电压进行比较， 若大于所述输出阀值电压， 则屏蔽所述控制单元的 芯片工作， 对所述 DC/DC转换系统进行保护。
优选地，所述控制单元将所述 DC/DC转换单元的输出电流与设定的输 出电流阀值进行比较， 若大于所述输出电流阀值， 则屏蔽控制单元的芯片 工作， 对所述 DC/DC转换系统进行保护。
优选地， 所述 DC/DC转换单元由变压器、 整流电路和滤波电路构成， 输入的电压信号经所述变压器变压， 再经整流电路整流和滤波电路滤波后 输出； 所述转换单元的输入端和输出端分别设置有电流传感器。
优选地， 所述控制单元的输出信号经放大、 滤波后对所述 DC/DC转换 单元进行驱动控制。
优选地， 所述装置的冷却方式为水冷。 本发明具有的有益效果：
在双电压供电系统的基础上， 本发明提供了一种能够将 42V系统电压 转化成 12V系统电压的 DC/DC转换装置， 来为 12V系统负载提供电压。 这样可以满足不同负载对不同供电系统的需要， 符合整车的需求。
附图说明
图 1 是双电压 DC/DC转换装置示意图；
图 2 是双电压 DC/DC转换装置中控制单元及转换单元结构图； 图 3 是双电压 DC/DC转换装置内部转换单元结构示意图；
图 4 是双电压 DC/DC转换装置内部控制单元结构示意图。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂， 下面结合附图对 本发明的具体实施方式做详细的说明。
参见图 1 , 该图为基于本发明双电压 DC/DC转换装置示意图。
本发明提供的汽车用双电压 DC/DC转换装置包括 DC/DC转换单元 103、 控制单元 102和车身控制器 ( HCU, Hybrid Control Unit ) 101。
所述 DC/DC转换单元 103和所述控制单元 102构成 DC/DC转换系统。 所述车身控制器 101根据整车负载状况以及电池的状况， 发送电压设 置信号和 DC/DC转换使能信号至所述控制单元 102。
所述控制单元 102控制所述 DC/DC转换单元 103输出电压。
参见图 2 , 该图为基于本发明双电压 DC/DC转换装置中控制单元及转 换单元接口图。
如图 1和图 2所示， DC/DC转换单元 103的温度信号， 及输入的电压 信号和电流信号以及输出的电压信号和电流信号传送到所述控制单元 102。
所述控制单元 102对上述各个信号进行检测并将转换单元 103输出的 电压信号和电流信号， 以及 DC/DC转换系统的状态信号 （DCDC— OK )发 送到所述 HCU101 以供检测。
所述控制单元 102将所述转换单元 101的温度信号与设定的阃值温度 (一般为 90 °C ) 进行比较。 若温度大于所述设定的阀值温度， 则屏蔽所述 控制单元 102的芯片工作， 对 DC/DC转换系统进行保护。 所述控制单元 102将所述转换单元 101 输入的电压信号与设定的输入 阀值电压（一般为 58V )进行比较。 若电压大于所述设定的输入阀值电压， 则屏蔽所述控制单元 102的芯片工作， 对 DC/DC转换系统进行保护。
所述控制单元 102将所述转换单元 101输入的电流信号与设定的输入 阀值电流进行比较， 若电流大于所述设定的输入阀值电流， 则屏蔽所述控 制单元 102的芯片工作， 对 DC/DC转换系统进行保护。
所述控制单元 102将所述转换单元 103输出的电压与设定的输出阀值 电压进行比较， 若电压大于所述设定的输出阀值电压， 则屏蔽所述控制单 元 102的芯片工作， 对 DC/DC转换系统进行保护。
所述控制单元 102将所述转换单元 103输出的电流与设定的输出阀值 电流进行比较， 若电压大于所述设定的输出阀值电流， 则屏蔽所述控制单 元 102的芯片工作， 对 DC/DC转换系统进行保护。
需要说明的是， 所述转换单元 103输入所述控制单元 102的输入信号 包括转换单元的输入电流信号、 输入电压信号、 输出电流信号、 输出电压 信号和温度信号。 所述控制单元 102对上述输入信号处理后输出控制信号 至所述转换单元 103 , 控制所述转换单元 103输出需要的电压。
参见图 3 , 该图为基于本发明双电压 DC/DC转换装置中转换单元结构 示意图。
所述的 DC/DC转换单元由变压器 T、 整流电路和滤波电路构成。
其中所述整流电路由二极管 D1和 D2构成； 所述滤波电路由电感 L3 和电容 C1构成。
输入的电压信号经所述变压器 Τ变压， 再经整流电路整流和滤波电路 滤波后输出。
转换单元的输入端和输出端分别设置有电流传感器 L1和 L2。
所述 L1和 L2分别用于检测所述转换单元输入端和输出端的电流； 发 送所述电流至所述控制单元。
参见图 4 , 该图为基于本发明双电压 DC/DC转换装置中控制单元结构 示意图。
控制单元 102输出信号经驱动电路 U3驱动以后， 对 DC/DC转换单元 103进行驱动控制。
所述驱动电路 U3包括放大电路放大和滤波电路滤波。
所述控制单元 102的输出信号至所述 HCU101。 所述输出信号包括电 流信号和工作状态信号。所述 HCU101通过所述电流信号判断 DC/DC转换 系统是否电流过低或过高， 当电流超过预定标准时， 进行软件保护。 所述 HCU101通过所述工作状态信号判断所述 DC/DC转换系统工作是否正常。
DC/DC转换系统的冷却方式是水冷， 其冷却系统和整车共用一个冷却 系统， 对整车改动较小。 DC/DC转换系统既可独立于车身控制器， 也可与 车身控制器集成在一起， 作为独立部件的时候， 通过车身线束和车身控制 器进行通信， 作为集成部件的时候可通过内部接插件进行通信连接。
所述 DC/DC转换系统的输入电压是 42 V。
所述输入电压一方面其可以直接作为 42V用电器的供电电压， 另一方 面是作为 DC/DC转换系统的输入电压， 通过 DC/DC转换系统转换成 12V 电压后供给 12V电气系统。
本 DC/DC 转换系统根据 12V 电气系统的需求， 输出电压范围为
12V-16V。
所述 DC/DC转换系统内部的转换单元和控制单元之间进行电气隔离， 防止所述转换单元高频干扰信号对所述控制单元的影响， 进而保证系统稳 定性较好。
以上所述，仅是本发明的较佳实施例而已， 并非对本发明作任何形式上的 限制。 虽然本发明已以较佳实施例揭露如上， 然而并非用以限定本发明。 任何 熟悉本领域的技术人员， 在不脱离本发明技术方案范围情况下， 都可利用上述 揭示的方法和技术内容对本发明技术方案做出许多可能的变动和修饰 ,或修改 为等同变化的等效实施例。 因此， 凡是未脱离本发明技术方案的内容， 依据本 发明的技术实质对以上实施例所做的任何简单修改、等同变化及修饰， 均仍属 于本发明技术方案保护的范围内。

Claims

权 利 要 求
1、 一种汽车用双电压 DC/DC转换装置， 其特征在于： 包括 DC/DC转 换单元、 控制单元和车身控制器； 所述 DC/DC转换单元和所述控制单元构 成 DC/DC转换系统； 所述车身控制器根据整车负载状况以及电池的状况， 发送电压设置信号和 DC/DC转换使能信号至所述控制单元； 所述控制单元 控制所述 DC/DC转换单元输出电压。
2、 根据权利要求 1所述的汽车用双电压 DC/DC转换装置， 其特征在 于， 所述 DC/DC转换单元的输入输出电压信号、 电流信号和温度信号传送 到所述控制单元； 所述控制单元对所述电压信号、 电流信号和温度信号进 行检测； 并将 DC/DC转换单元的输出电流信号和 DC/DC转换系统的状态 信号传送到所述车身控制器以供检测。
3、 根据权利要求 2所述的汽车用双电压 DC/DC转换装置， 其特征在 于，所述控制单元将所述 DC/DC转换单元的温度信号与设定的阀值温度进 行比较； 若大于所述阀值温度， 则屏蔽所述控制单元的芯片工作， 对所述 DC/DC转换系统进行保护。
4、 根据权利要求 3所述的汽车用双电压 DC/DC转换装置， 其特征在 于，所述控制单元将所述 DC/DC转换单元的输入电压信号与设定的输入阀 值电压进行比较； 若大于所述输入阀值电压， 则屏蔽所述控制单元的芯片 工作， 对所述 DC/DC转换系统进行保护。
5、 根据权利要求 4所述的汽车用双电压 DC/DC转换装置， 其特征在 于，所述控制单元将所述 DC/DC转换单元的输入电流信号与设定的阀值电 流进行比较， 若大于所述阀值电流， 则屏蔽所述控制单元的芯片工作， 对 所述 DC/DC转换系统进行保护。
6、 根据权利要求 5所述的汽车用双电压 DC/DC转换装置， 其特征在 于，所述控制单元将所述 DC/DC转换单元的输出电压与设定的输出阀值电 压进行比较， 若大于所述输出阀值电压， 则屏蔽所述控制单元的芯片工作， 对所述 DC/DC转换系统进行保护。
7、 根据权利要求 6所述的汽车用双电压 DC/DC转换装置， 其特征在 于： 所述控制单元将所述 DC/DC转换单元的输出电流与设定的输出电流阀 值进行比较， 若大于所述输出电流阀值， 则屏蔽控制单元的芯片工作， 对 所述 DC/DC转换系统进行保护。
8、 根据权利要求 1至 7任意一项所述的汽车用双电压 DC/DC转换装 置， 其特征在于， 所述 DC/DC转换单元由变压器、 整流电路和滤波电路构 成， 输入的电压信号经所述变压器变压， 再经整流电路整流和滤波电路滤 波后输出； 所述转换单元的输入端和输出端分别设置有电流传感器。
9、 根据权利要求 1至 7任意一项所述的汽车用双电压 DC/DC转换装 置， 其特征在于， 所述控制单元的输出信号经放大、 滤波后对所述 DC/DC 转换单元进行驱动控制。
10、 根据权利要求 1至 7任一项所述的汽车双电压 DC/DC转换装置， 其特征在于， 所述装置的冷却方式为水冷。
PCT/CN2008/073681 2008-04-25 2008-12-24 一种汽车用双电压dc/dc转换装置 Ceased WO2009129685A1 (zh)

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CN101282087B (zh) * 2008-04-25 2011-06-08 奇瑞汽车股份有限公司 一种汽车用双电压dc/dc转换方法
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CN1263629C (zh) * 2003-11-04 2006-07-12 清华大学 燃料电池混合动力系统的功率分配方法
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JP2007315290A (ja) * 2006-05-25 2007-12-06 Toyota Motor Corp 可変動弁装置、その制御方法及びこれを搭載した車両
CN101282087A (zh) * 2008-04-25 2008-10-08 奇瑞汽车股份有限公司 一种汽车用双电压dc/dc转换方法

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JP2007315290A (ja) * 2006-05-25 2007-12-06 Toyota Motor Corp 可変動弁装置、その制御方法及びこれを搭載した車両
CN1996705A (zh) * 2006-12-21 2007-07-11 奇瑞汽车有限公司 混合动力汽车的dc－dc转换控制系统及控制方法
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