WO2020029139A1 - 大电流导流构件以及具有该导流构件的车载充电机 - Google Patents

大电流导流构件以及具有该导流构件的车载充电机 Download PDF

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Publication number
WO2020029139A1
WO2020029139A1 PCT/CN2018/099464 CN2018099464W WO2020029139A1 WO 2020029139 A1 WO2020029139 A1 WO 2020029139A1 CN 2018099464 W CN2018099464 W CN 2018099464W WO 2020029139 A1 WO2020029139 A1 WO 2020029139A1
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Prior art keywords
copper bar
circuit board
copper
conducting member
current
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PCT/CN2018/099464
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English (en)
French (fr)
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罗耀文
冯颖盈
姚顺
刘钧
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深圳威迈斯电源有限公司
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Priority to PCT/CN2018/099464 priority Critical patent/WO2020029139A1/zh
Publication of WO2020029139A1 publication Critical patent/WO2020029139A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/01—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the form or arrangement of the conductive interconnection between the connecting locations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/03—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations
    • H01R11/05—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations the connecting locations having different types of direct connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes

Definitions

  • the invention relates to a charging device, in particular to a high-current current-guiding member and a vehicle-mounted charger DCDC assembly having the same.
  • the on-board charger, DCDC converter of electric vehicles, and the integration of on-board chargers and DCDC converters are important components in electric vehicles.
  • the conversion circuit converts AC power (or DC power) into DC power of appropriate amplitude and then passes
  • the current-conducting member connection socket outputs external power.
  • the current guide member is a copper bar, and both ends of the copper bar are fixed by screws.
  • the present invention is to solve the above-mentioned problems of the prior art, and proposes a large-current current-conducting member with reliable contact, no installation stress, and anti-electromagnetic interference function.
  • the technical solution proposed by the present invention is to design a high-current current-conducting member having strip-shaped copper strips, the middle of which is bent at 90 degrees, and the copper strips are divided into copper strip horizontal sections and copper
  • the vertical section of the copper bar is provided with a first through hole at the end of the horizontal section of the copper bar for screw connection with the copper post of the high-current output connector.
  • the end of the vertical section of the copper bar is provided with a plurality of comb-shaped welding feet. The soldering foot penetrates the circuit board from the bottom to the top and is soldered to the circuit board.
  • the vertical section of the copper bar is sheathed with a ring-shaped filter magnetic core.
  • the filter magnetic core may be adhered to the vertical section of the copper bar with adhesive; the filter magnetic core may also be fixed in a collar, and the collar is clamped on the vertical section of the copper bar with an interference fit; A base can be clamped on the vertical section of the copper bar, a clamp head is erected on the base, and the filter magnetic core is clamped on the base by the clamp head.
  • the large current diversion member also includes an EMC filter current plate.
  • the end of the EMC filter current plate is provided with a second through hole, and the second through hole and the first through hole are coaxially arranged, so that the copper bar and the The EMC filter current plates are stacked together and screwed with the copper posts of the output connector.
  • the invention also designs a vehicle-mounted charger, which includes a casing, a circuit board fixed in the casing, and an output connector fixed on a side wall of the casing.
  • One end of the output connector is a copper post, which is used for vehicle charging.
  • the machine uses the above-mentioned high-current conducting member to connect the circuit board and the output connector.
  • a plurality of support pillars are provided on the inner side wall of the casing, and screw holes are provided at the ends of the support pillars, and the circuit board is fixed on the support pillars by screws; The position is slightly lower than the position of the end of the soldering pin to facilitate soldering the soldering pin to the circuit board.
  • a plurality of supporting feet supporting the high-current conducting member is erected on the bottom plate of the casing, so as to stably support the large-current conducting member.
  • the present invention has reliable contact, no installation stress, no excessive resistance, good current guiding effect, filtering function and EMC anti-electromagnetic interference function, and can be widely applied to vehicle charger OBC, voltage converter DCDC and Related integrated products.
  • FIG. 1 is a schematic view of a copper bar in a preferred embodiment of the present invention
  • FIG. 2 is a schematic diagram of a combination of a copper bar and a filter core in a preferred embodiment of the present invention
  • FIG. 3 is a schematic diagram of an EMC filter current plate in a preferred embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a connection between a casing and an output connector in a preferred embodiment of the present invention
  • FIG. 5 is a schematic diagram of installing a copper bar and a filtering magnetic core in a casing in a preferred embodiment of the present invention
  • FIG. 6 is a schematic diagram of installing a copper bar, a filtering magnetic core, and an EMC filtering current board in a casing of a preferred embodiment of the present invention
  • FIG. 7 is a schematic diagram of screwing an output connector to a copper bar and an EMC filter current board in a preferred embodiment of the present invention
  • FIG. 8 is a schematic diagram of a copper bar connecting circuit board in a preferred embodiment of the present invention.
  • the present invention discloses a high-current conducting member.
  • the high-current conducting member has a strip-shaped copper bar 1 which is bent at 90 degrees in the middle to divide the copper bar into a copper bar horizontal section 2 and copper.
  • the vertical section 3 of the copper bar is provided with a first through hole 4 at the end of the horizontal section of the copper bar for screw connection with the copper post 5 of the output connector.
  • the end of the vertical section of the copper bar is provided with a plurality of comb-shaped welds.
  • Pin 6, the soldering pin penetrates the circuit board 7 from bottom to top, and is soldered to the circuit board.
  • the vertical section of the copper bar coats a ring-shaped filter magnetic core 8.
  • the filter core can suppress the surge in the charging circuit and protect the charging circuit and battery.
  • the filter magnetic core 8 is adhered to the copper bar vertical section 2 with an adhesive. This example does not show a drawing.
  • the filter magnetic core 8 is fixed in a ferrule, and the ferrule is clamped on the copper strip vertical segment 2 with an interference fit. This example does not show a drawing.
  • a base 9 is clamped on the vertical section 3 of the copper bar, and a chuck 9 a is erected on the base, and the filter core 8 is clamped on the chuck. On the base.
  • the high-current conducting member further includes an EMC filter current plate 10, as shown in FIG. 3.
  • the EMC filter current board is connected to the output power and ground, which can realize the EMC anti-electromagnetic interference function, so that the product runs in compliance with the requirements in its electromagnetic environment and does not cause any interference to its equipment in the environment.
  • a second through hole 11 is provided at an end of the EMC filter current plate, and the second through hole and the first through hole 4 are coaxially disposed, which facilitates stacking the copper bar 1 and the EMC filter current plate. Screwing together the copper post 5 of the output connector together also completes the electrical connection between the EMC filter current board and the output line.
  • Figure 7 shows a schematic diagram of screwing the output connector to the copper bar and the EMC filter current board.
  • a vehicle-mounted charger includes a casing 12, a circuit board 7 fixed in the casing, and an output connector fixed on a side wall of the casing.
  • One end of the output connector is a copper pillar 5 and uses the above-mentioned large current.
  • a deflector member connects the circuit board and the output connector.
  • FIG. 4 shows a schematic diagram of the connection between the casing and the output connector.
  • the copper post 5 of the output connector is provided with a threaded hole.
  • Figure 5 shows a schematic diagram of copper bars and filter cores installed in the enclosure. Referring to FIG.
  • the circuit board 7 is lowered from above, the soldering pin 6 penetrates the circuit board, fixes the circuit board, and then solders the soldering pin 6 to the circuit board.
  • the installation of large current diversion members benefits from the improvement of modern industrial processing accuracy.
  • the shell 12, the circuit board 7, and the output connector have a high size and drilling accuracy. After the three are assembled, the ends of the soldering pins 6 just expose a small section of the circuit board, so the structure is convenient for soldering. With this structure, the product is very compact, the layout is scientific and reasonable, the diversion members have reliable contact, no installation stress, no excessive impedance, good diversion effect, and filter function and EMC anti-electromagnetic interference function.
  • a plurality of support posts 13 are provided on an inner side wall of the cabinet 12, screw holes are provided at ends of the support posts, and the circuit board 7 is fixed on the support posts by screws; the support post holders Lift the circuit board so that the position of the circuit board is slightly lower than the position of the end of the soldering pin 6 to facilitate soldering the soldering pin to the circuit board.
  • a plurality of supporting feet 14 supporting the high-current conducting member is erected on the bottom plate of the casing 12 so as to stably support the high-current conducting member.

Abstract

一种大电流导流构件以及具有该导流构件的车载充电机，其中大电流导流构件具有条状的铜条(1)，所述铜条(1)中部90度弯折，将铜条(1)分成铜条水平段(2)和铜条垂直段(3)，铜条水平段(2)的端部设有第一通孔(4)、用以同输出连接器的铜柱(5)进行螺接，铜条垂直段(3)的端部设有多个梳齿状的焊接脚(6)，所述焊接脚(6)由下而上穿透电路板(7)、并与电路板(7)焊接；与现有技术相比，该大电流导流构件接触可靠，无安装应力，没有过高阻抗，导流效果良好，具有滤波功能和EMC抗电磁干扰功能，可广泛适用于车载充电机OBC、电压变换器DCDC以及相关集成产品。

Description

大电流导流构件以及具有该导流构件的车载充电机 技术领域
本发明涉及充电设备，尤其涉及一种大电流导流构件以及具有该导流构件的车载充电机DCDC总成。
背景技术
随着节能减排，以及控制大气污染的需求，新能源汽车逐渐在市场商用，而电动汽车更是新能源汽车的主力军。电动汽车的车载充电机、DCDC转换器，以及车载充电机和DCDC转换器集成是电动汽车中重要部件，在电路板上，变换电路将交流电(或直流电)变换为合适幅值的直流电然后通过大电流导流构件连接插口对外输出电能。现有的导流构件是铜排，铜排两端均采用螺钉固定。先将电路板安装在机壳上，把铜排的一端螺接在电路板上，在把铜排的一端螺接在输出连接器的铜柱上，在旋紧螺钉铜排会有旋转和撬动的趋势，铜排与铜柱之间、铜排与电路板之间会存在很大的应力，容易造成接触不良，功能失效的隐患，同时也会导致铜排不能很好的贴合在铜柱上，导致接触阻抗过大温度过高；并且现有的导流构件没有抗电磁干扰功能。
故此业内亟需开发一种接触可靠，无安装应力，具有滤波功能和抗电磁干扰功能的大电流导流构件。
发明内容
本发明是要解决现有技术的上述问题，提出一种接触可靠，无安装应力，具有抗电磁干扰功能的大电流导流构件。
为解决上述技术问题，本发明提出的技术方案是设计一种大电流导流构件，其具有条状的铜条，所述铜条中部90度弯折，将铜条分成铜条水平段和铜条垂直段，铜条水平段的端部设有第一通孔、用以同大电流输出连接器的铜柱进行螺接，铜条垂直段的端部设有多个梳齿状的焊接脚，所述焊接脚由下而上穿透电路板、并与电路板焊接。
所述铜条垂直段外套一个圈状的滤波磁芯。
所述滤波磁芯可以用粘胶粘附在所述铜条垂直段上；所述滤波磁芯也可 以固定在一个套环中，套环采用过盈配合卡在所述铜条垂直段上；所述铜条垂直段上还可以卡接一个基座，该基座上竖立卡头，所述滤波磁芯被所述卡头卡接在所述基座上。
大电流导流构件还包括一块EMC滤波电流板，该EMC滤波电流板的端部设有第二通孔，所述第二通孔和所述第一通孔同轴放置，便于将铜条和EMC滤波电流板叠在一起与输出连接器的铜柱进行螺接。
本发明还设计了一种车载充电机，其包括机壳、固定在机壳内的电路板、固定在机壳侧壁上的输出连接器，所述输出连接器的一端为铜柱，车载充电机采用了上述大电流导流构件来连接所述电路板和输出连接器。
所述机壳的内侧壁上设有多个支撑柱，所述支撑柱端部设有螺丝孔，所述电路板通过螺钉固定在支撑柱上；所述支撑柱托举电路板，使电路板的位置略低于所述焊接脚端头的位置，以利于将焊接脚焊接在电路板上。
所述机壳的底板上竖立多个支撑大电流导流构件的撑脚，以便稳固支撑大电流导流构件。
与现有技术相比，本发明接触可靠，无安装应力，没有过高阻抗，导流效果良好，具有滤波功能和EMC抗电磁干扰功能，可广泛适用于车载充电机OBC、电压变换器DCDC以及相关集成产品。
附图说明
图1为本发明较佳实施例中铜排示意图；
图2为本发明较佳实施例中铜排和滤波磁芯组合示意图；
图3为本发明较佳实施例中EMC滤波电流板示意图；
图4为本发明较佳实施例中机壳和输出连接器连接示意图；
图5为本发明较佳实施例中机壳中安装铜排和滤波磁芯示意图；
图6为本发明较佳实施例中机壳中安装铜排、滤波磁芯和EMC滤波电流板示意图；
图7为本发明较佳实施例中输出连接器与铜排和EMC滤波电流板螺接示意图；
图8为本发明较佳实施例中铜排连接电路板示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明作进一步详细说明。应当理解，此处所描述的具体实施例仅仅用于解释本发明，并不用于限定本发明。
本发明公开了一种大电流导流构件，参看图1，大电流导流构件具有条状的铜条1，所述铜条中部90度弯折，将铜条分成铜条水平段2和铜条垂直段3，铜条水平段的端部设有第一通孔4、用以同输出连接器的铜柱5进行螺接，铜条垂直段的端部设有多个梳齿状的焊接脚6，所述焊接脚由下而上穿透电路板7、并与电路板焊接。采用此结构，各部件较为紧凑，可以使设备体积大为缩小。安装后接触可靠，无安装应力，没有过高阻抗，导流效果良好。
参看图2示出的较佳实施例，所述铜条垂直段外套一个圈状的滤波磁芯8。滤波磁芯可以抑制充电线路中的浪涌，保护充电电路和电池。
滤波磁芯8和铜条的固定的方式有多种，在一个实施例中，所述滤波磁芯8用粘胶粘附在所述铜条垂直段2上。该例未给出附图。
在另一个实施例中，所述滤波磁芯8固定在一个套环中，套环采用过盈配合卡在所述铜条垂直段2上。该例未给出附图。
在图2示出的较佳实施例中，所述铜条垂直段3上卡接一个基座9，该基座上竖立卡头9a，所述滤波磁芯8被所述卡头卡接在所述基座上。
在较佳实施例中大电流导流构件还包括一块EMC滤波电流板10，如图3所示。EMC滤波电流板连接输出电源和地，可以实现EMC抗电磁干扰功能，使得产品在其电磁环境中符合要求运行并不对其环境中的任何设备产生干扰。参看图6，所述EMC滤波电流板的端部设有第二通孔11，所述第二通孔和所述第一通孔4同轴放置，便于将铜条1和EMC滤波电流板叠在一起与输出连接器的铜柱5进行螺接，同时也是完成EMC滤波电流板与输出线路的电连接。图7示出了输出连接器与铜排和EMC滤波电流板螺接示意图。
一种车载充电机，包括机壳12、固定在机壳内的电路板7、固定在机壳侧壁上的输出连接器，所述输出连接器的一端为铜柱5，采用了上述大电流导流构件来连接所述电路板和输出连接器。图4示出了机壳和输出连接器连接示意图，输出连接器的铜柱5上开有螺纹孔。图5示出了机壳中安装铜排和滤波磁芯的示意图。参看图8，安装好铜排、滤波磁芯和EMC滤波电流板之后，电路板7由上面放下，焊接脚6穿透电路板，固定电路板，再将焊接脚6焊接在电路板上。大电流导流构件的安装，得益于现代工业加工精度的提高。外壳12和电路板7和输出连接器三者的尺寸和钻孔精度较高，三者组装后， 焊接脚6的端部刚好露出电路板一小段，如此结构便于焊接。采用此结构，产品非常紧凑，布局科学合理，导流构件接触可靠，无安装应力，没有过高阻抗，导流效果良好，具有滤波功能和EMC抗电磁干扰功能。
参看图4，所述机壳12的内侧壁上设有多个支撑柱13，所述支撑柱端部设有螺丝孔，所述电路板7通过螺钉固定在支撑柱上；所述支撑柱托举电路板，使电路板的位置略低于所述焊接脚6端头的位置，以利于将焊接脚焊接在电路板上。
在较佳实施例中，所述机壳12的底板上竖立多个支撑大电流导流构件的撑脚14，以便稳固支撑大电流导流构件。
以上实施例仅为举例说明，非起限制作用。任何未脱离本申请精神与范畴，而对其进行的等效修改或变更，均应包含于本申请的权利要求范围之中。

Claims (9)

  1. 一种大电流导流构件，其特征在于：具有条状的铜条(1)，所述铜条中部90度弯折，将铜条分成铜条水平段(2)和铜条垂直段(3)，铜条水平段的端部设有第一通孔(4)、用以同输出连接器的铜柱(5)进行螺接，铜条垂直段的端部设有多个梳齿状的焊接脚(6)，所述焊接脚由下而上穿透电路板(7)、并与电路板焊接。
  2. 如权利要求1所述的大电流导流构件，其特征在于：所述铜条垂直段外套一个圈状的滤波磁芯(8)。
  3. 如权利要求2所述的大电流导流构件，其特征在于：所述滤波磁芯(8)用粘胶粘附在所述铜条垂直段(2)上。
  4. 如权利要求2所述的大电流导流构件，其特征在于：所述滤波磁芯(8)固定在一个套环中，套环采用过盈配合卡在所述铜条垂直段(2)上。
  5. 如权利要求2所述的大电流导流构件，其特征在于：所述铜条垂直段(3)上卡接一个基座(9)，该基座上竖立卡头(9a)，所述滤波磁芯(8)被所述卡头卡接在所述基座上。
  6. 如权利要求1所述的大电流导流构件，其特征在于：还包括一块EMC滤波电流板(10)，该EMC滤波电流板的端部设有第二通孔(11)，所述第二通孔和所述第一通孔(4)同轴放置，便于将铜条(1)和EMC滤波电流板叠在一起与输出连接器的铜柱(5)进行螺接。
  7. 一种车载充电机，包括机壳(12)、固定在机壳内的电路板(7)、固定在机壳侧壁上的输出连接器，所述输出连接器的一端为铜柱(5)，其特征在于：采用了权利要求1至6任一项所述的大电流导流构件来连接所述电路板和输出连接器。
  8. 如权利要求7所述的车载充电机，其特征在于：所述机壳(12)的内侧壁上设有多个支撑柱(13)，所述支撑柱端部设有螺丝孔，所述电路板(7)通过螺钉固定在支撑柱上；所述支撑柱托举电路板，使电路板的位置略低于所述焊接脚(6)端头的位置，以利于将焊接脚焊接在电路板上。
  9. 如权利要求8所述的车载充电机，其特征在于：所述机壳(12)的底板上竖立多个支撑大电流导流构件的撑脚(14)。
PCT/CN2018/099464 2018-08-08 2018-08-08 大电流导流构件以及具有该导流构件的车载充电机 WO2020029139A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5228873A (en) * 1992-02-28 1993-07-20 Honda Tsushin Kogyo Kabushiki Kaisha Metallic-shell-equipped electrical connector
CN201260017Y (zh) * 2008-03-24 2009-06-17 梁朝华 一种接线端子片
CN202695885U (zh) * 2012-07-13 2013-01-23 海韵电子工业股份有限公司 滤波连接器
CN202712942U (zh) * 2012-06-29 2013-01-30 帝发技术(无锡)有限公司 多用途充电器
CN107458254A (zh) * 2017-08-15 2017-12-12 安徽华凯新能源科技有限公司 安全车载充电机
CN207069106U (zh) * 2017-08-14 2018-03-02 江苏海尚变频技术有限公司 一种电路板连接专用焊接端子

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5228873A (en) * 1992-02-28 1993-07-20 Honda Tsushin Kogyo Kabushiki Kaisha Metallic-shell-equipped electrical connector
CN201260017Y (zh) * 2008-03-24 2009-06-17 梁朝华 一种接线端子片
CN202712942U (zh) * 2012-06-29 2013-01-30 帝发技术(无锡)有限公司 多用途充电器
CN202695885U (zh) * 2012-07-13 2013-01-23 海韵电子工业股份有限公司 滤波连接器
CN207069106U (zh) * 2017-08-14 2018-03-02 江苏海尚变频技术有限公司 一种电路板连接专用焊接端子
CN107458254A (zh) * 2017-08-15 2017-12-12 安徽华凯新能源科技有限公司 安全车载充电机

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