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WO2018137557A1 - Ensemble connecteur et système de connexion de batterie le comprenant - Google Patents

Ensemble connecteur et système de connexion de batterie le comprenant Download PDF

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Publication number
WO2018137557A1
WO2018137557A1 PCT/CN2018/073349 CN2018073349W WO2018137557A1 WO 2018137557 A1 WO2018137557 A1 WO 2018137557A1 CN 2018073349 W CN2018073349 W CN 2018073349W WO 2018137557 A1 WO2018137557 A1 WO 2018137557A1
Authority
WO
WIPO (PCT)
Prior art keywords
interface
connector assembly
liquid interface
liquid
electrical interface
Prior art date
Application number
PCT/CN2018/073349
Other languages
English (en)
Chinese (zh)
Inventor
漆辉
方杰
Original Assignee
上海蔚来汽车有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海蔚来汽车有限公司 filed Critical 上海蔚来汽车有限公司
Publication of WO2018137557A1 publication Critical patent/WO2018137557A1/fr

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Classifications

    • 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
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing 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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure

Definitions

  • the present invention relates to the field of electromechanical connection technology; in particular, the present invention relates to a connector assembly. Still further, the present invention also relates to a battery connection system including the same.
  • a liquid-cooled battery pack for an electric vehicle is usually provided with a separate high-voltage electrical connector, a low-voltage electrical connector, a liquid connector, etc., wherein the high-voltage electrical connector is used to output the power of the battery pack to the body motor and to the battery pack.
  • the low-voltage electrical connector is used for low-voltage power supply and communication between the battery pack and the body.
  • the liquid connector transfers the coolant from the radiator or water pump to the cooling water jacket of the battery pack.
  • electrical connectors and liquid connectors are inserted and removed in different ways for safety reasons. Specifically, although they are arranged at the junction of the liquid-cooled battery pack and the electric vehicle body, the high-voltage and low-voltage electrical connectors generally have a locking device, which can only be inserted and removed by manual operation; and the liquid connector Generally, it cannot be disassembled after assembly to avoid coolant loss and environmental pollution. Because of these functional differences, while taking into account safety issues, electrical connectors and liquid connectors are typically designed separately and placed at different joints.
  • the invention also relates to an apparatus comprising such a connector assembly.
  • a first aspect of the present invention provides a connector assembly, wherein the connector assembly includes:
  • An electrical interface including a first end of the electrical interface and a second end of the electrical interface
  • the liquid interface includes a first end of the liquid interface and a second end of the liquid interface, and the first end of the liquid interface and the second end of the liquid interface each have a shutoff valve;
  • first end of the electrical interface and the first end of the liquid interface are fixed to the first component, and the second end of the electrical interface and the second end of the liquid interface are fixed to the second component.
  • a high voltage interface and a low pressure interface are integrated in the electrical interface, and/or the liquid interface is a coolant interface.
  • the first end of the electrical interface and the first end of the liquid interface are fixed side by side to the same surface on the first component, the electrical interface being second The end and the second end of the liquid interface are fixed side by side to the same surface on the second component.
  • the interface between the first end of the electrical interface and the second end of the electrical interface and the first end of the liquid interface and the second end of the liquid interface Coplanar.
  • the first end of the electrical interface and the second end of the electrical interface have a guide for facilitating their adaptation, and/or the first end of the liquid interface
  • the second end of the liquid interface has a guide for facilitating its fitting.
  • One of the first end of the electrical interface and the second end of the electrical interface is a socket end having a PIN pin receptacle, the socket end being mounted to the first component by a first floating mechanism;
  • the first end of the liquid interface is mounted to the first component by a second floating mechanism or the second end of the liquid interface is mounted to the second component by a second floating mechanism.
  • the socket end includes a housing composed of an upper cover and a base, and the intermediate cover has a middle baffle, a fixing seat for arranging the PIN pin, and
  • the first floating mechanism wherein the first floating mechanism comprises:
  • a first horizontal floating block and a second horizontal floating block respectively located above and below the fixing seat at the through hole; a spring, the spring sleeve is outside the pin shaft, and both end faces thereof respectively Relying on the intermediate baffle and the first horizontal slider;
  • a horizontal floating elastic member that is placed in the interlayer of the mount and has a gap with the mount.
  • the second floating mechanism comprises:
  • a horizontal slider comprising two flaps and a joint connected between the two flaps, the joint passing through the horizontal floating elastic body, and the two flaps respectively covering the pass Both ends of the hole;
  • the elastic body is a columnar rubber body, and a tooth groove is distributed on the outer peripheral surface thereof.
  • a second aspect of the invention provides a device, wherein the device comprises the connector assembly of any of the preceding first aspects.
  • the device is an electric vehicle
  • the first component is a chassis of the electric vehicle
  • the second component is a battery pack of a power battery pack of the electric vehicle. case.
  • the connector assembly is secured to the underbody and the battery pack housing by mounting brackets.
  • Figure 1 shows a schematic view of a connector assembly in accordance with an embodiment of the present invention
  • Figure 2 is a second end of the electrical interface of the electrical interface of the connector assembly of Figure 1;
  • Figure 3 is a first end of the electrical interface of the electrical interface of the connector assembly of Figure 1;
  • Figure 4 is an exploded view of the first end of the electrical interface of Figure 3, showing the first floating mechanism
  • Figure 5 is a first end of the liquid interface of the liquid interface of the connector assembly of Figure 1;
  • Figure 6 is a second end of the liquid interface of the liquid interface of the connector assembly of Figure 1;
  • Figure 7 is an exploded view of the second floating mechanism of the first end of the liquid interface of Figure 5.
  • Figure 1 shows a schematic view of a connector assembly in accordance with an embodiment of the present invention.
  • the connector assembly includes an electrical interface 100 and a liquid interface 200.
  • the electrical interface 100 includes a first interface 110 and a second end 120 of the electrical interface that are adapted to each other.
  • the electrical circuit is turned on and off when the two are turned on and off;
  • the liquid interface 200 includes a first end of the liquid interface that is adapted to each other.
  • 210 and the second end 220 of the liquid interface when the two are turned on and off, the liquid cooling circuit is turned on and off.
  • the liquid interface 200 can also be used in other liquid circuits.
  • first component 10 and the liquid interface first end 210 are secured to the first component 10
  • the electrical interface second end 120 and the liquid interface second end 220 are secured to the second component 20.
  • the connector assembly of the present invention is applied to an electric vehicle in which the first component 10 is the body base of the electric vehicle and the second component 20 is the battery case of the power battery pack of the electric vehicle.
  • the connector assembly is used for high and low voltage electrical connections and liquid cooling circuit connections of the battery pack.
  • first component 10 and second component 20 may be any component that requires electrical and liquid connections and is not limited to the examples of this embodiment.
  • first end 110 of the electrical interface is shown as an electrical outlet and the second end 120 of the electrical interface is shown as an electrical plug, the first end 110 of the electrical interface is electrically
  • the plug, electrical interface second end 120 as an electrical receptacle will also fall within the scope of the present invention; although in the illustrated embodiment the liquid interface first end 210 is shown as a liquid cooled plug and the liquid interface second end 220 is shown as a liquid Cold socket, however, it will also fall within the scope of the present invention to have the liquid interface first end 210 as a liquid cooled socket and the liquid interface second end 220 as a liquid cooled plug; in addition, those skilled in the art can have the teachings of the present disclosure in accordance with the teachings of the present disclosure. Corresponding adjustments are made to the detailed features of the specific embodiments.
  • the electrical interface first end 110 and the electrical interface second end 120 are turned on while the liquid interface first end 210 and the liquid interface are The two ends 220 are turned on; when the first component 10 and the second component 20 are separated, the electrical interface first end 110 and the electrical interface second end 120 are disconnected, while the liquid interface first end 210 and the liquid interface second End 220 is disconnected. Therefore, in order to prevent the coolant in the liquid cooling circuit from leaking when the liquid interface first end 210 and the liquid interface second end 220 are disconnected, the liquid interface first end 210 and the liquid interface second end 220 each have a shutoff valve.
  • shutoff valve When the first end 210 and the second end 220 of the liquid interface are disconnected, the shutoff valve simultaneously closes the interface, and the cooling liquid does not flow out; when the first end 210 and the second end 220 of the liquid interface are assembled together, the shutoff valve opens Turn on the liquid cooling circuit.
  • the first ends 110, 210 and the second ends 120, 220 of the electrical interface 100 and the liquid interface 200 may be secured to the first component 10 and the second component 20 by mounting brackets, such as brackets 12, 13, as shown, as shown A bolt or the like is directly fixed to the first member 10 and the second member 20 in a conventional manner.
  • the fixing bracket may be fixed to the first member 10 and the second member 20 by a conventional manner such as bolting or welding, and then the electrical interface 100 and the liquid interface 200 are fixed to the brackets 12, 13, for example, by bolts.
  • Other alternatives of attachment and attachment are contemplated by those skilled in the art and are not described herein.
  • the electrical interface first end 110 and the liquid interface first end 210 are preferably secured side by side to the same surface 11 on the first component 10, the electrical interface The second end 120 and the liquid interface second end 220 are preferably secured to the same surface 21 side by side at the second component 20.
  • the interface between the first end 110 of the electrical interface and the second end 120 of the electrical interface is coplanar with the interface of the first end 210 of the liquid interface and the second end 220 of the liquid interface, which will also facilitate the automatic mounting of the electrical interface and the liquid interface. Demolition.
  • the electrical interface first end 110 and the liquid interface first end 210 are optionally placed on different surfaces and/or the electrical interface second end 120 and the liquid interface second end 220 are placed on different surfaces, or the electrical interface
  • the interface of the one end 110 and the second end 120 of the electrical interface is not in common with the interface of the first end 210 of the liquid interface and the second end 220 of the liquid interface, and can be achieved and will fall within the scope of the present invention.
  • guides are also provided in the electrical interface and the liquid interface to further facilitate assembly errors, as will be described below in connection with specific examples.
  • FIG. 2 is a second end 120 of the electrical interface of the electrical interface 100 of the connector assembly of FIG. 1;
  • FIG. 3 is a first end 110 of the electrical interface of the electrical interface 100 of the connector assembly of FIG.
  • a high voltage interface and a low voltage interface are integrated in the electrical interface 100.
  • the electrical interface first end 110 is an electrical receptacle having a PIN pin receptacle
  • the electrical interface second end 120 is an electrical plug having a PIN pin, including a high voltage PIN pin 122.
  • low voltage PIN pin 123 and the like In the assembled state of the electrical interface, the high and low voltage PIN pins will be inserted into the PIN pin receptacles on the first end 110 of the electrical interface to effect energization.
  • the electrical socket (electrical interface first end 110) is mounted on the vehicle body base and the electrical plug (electrical interface second end 120) is mounted on the battery pack end; it can be understood that in different embodiments, The interchangeability of the electrical plug and the electrical receptacle is also within the scope of the present invention.
  • the second end 120 of the electrical interface is the battery pack end of the connector, which can be directly fixed by bolts or fixed by bolts and brackets, and the internal high voltage PIN pin 122, low voltage PIN pin 123 and high voltage interlock pin 125 There are X, Y, Z-direction floating mechanisms (see Figure 4 for details).
  • the end of the high voltage PIN pin 122 can be an insulating material, which can prevent finger touch. It is a high voltage power supply output and charging interface of the battery pack; the low voltage PIN pin 123 can realize a low voltage power supply and communication interface, and has two short PIN pins 125.
  • the PE pin 124 can realize the equipotential bonding of the metal case of the battery pack end plug to the battery pack case.
  • the first end 110 of the electrical interface is the body end of the connector, which can also be fixed directly by bolts or by bolts and brackets.
  • the first end 110 of the electrical interface has a high voltage PIN pin jack 111 for inserting the high voltage PIN pin 122, the low voltage PIN pin 123, the high voltage interlock pin 125 and the PE pin 124, a low voltage PIN pin jack 113, and a high voltage interlock pin insertion. Hole 115 and PE pin jack 114.
  • the electrical interface first end 110 and the electrical interface second end 120 have guides that facilitate their adaptation.
  • the guide member includes a guide pin 121 on the second end 120 of the electrical interface and a cylindrical guide sleeve 111 on the first end 110 of the electrical interface.
  • guide pin 121 and guide sleeve 111 are disposed at both ends of electrical interface second end 120 and electrical interface first end 110, respectively; other arrangements and arrangements are contemplated by those skilled in the art.
  • the end of the guide pin 121 may be tapered in a tapered manner, for example, by guiding it into the guide sleeve 111 for positioning, which facilitates automatic guiding and deviation correction of the connector.
  • the first end of the electrical interface includes an upper cover 116, a middle baffle 117, a high and low voltage PIN pin crimp mount 118, a floating mechanism 130, and a base 119.
  • the upper cover 116 and the base 119 form a housing of the first end 110 of the electrical interface, and the intermediate baffle 117, the fixed base 118 and the floating mechanism 130 are located in the housing.
  • the floating mechanism 130 is an X, Y, Z three-way floating mechanism including a pin 131, a spring 132, a first horizontal floating block 133, a horizontal floating elastic member 134, and a second horizontal floating block 135.
  • the pin 131 passes through the through hole of the fixing base 118, and its two ends are respectively inserted (for example, by a PIN connection) into the holes in the intermediate shutter 117 and the base 119.
  • the first horizontal slider and the second horizontal slider are located above and below the fixed seat at the through holes, respectively.
  • the spring 132 is sleeved on the outside of the pin shaft 131, and its both end faces abut against the intermediate baffle 117 and the first horizontal slider 133, respectively.
  • the horizontal floating elastic member is placed in the interlayer of the mount and there is a gap between the mount and the mount.
  • the fixing seat 118 has a gap with the horizontal floating elastic member 134, and the horizontal floating elastic member 134 can be pressed to deform at any angle on the horizontal plane.
  • the spring 132 is pressed along the axial direction of the pin 131, so that the fixing base 118, the first horizontal floating block 133, the horizontal floating elastic member 134, and the second horizontal floating block 135 are integrally moved in the
  • the first end 210 of the liquid interface illustratively includes a float mechanism 211, a pressure sensor 212, and a body end stop valve of the fluid interface 200. 213 and the body end floating plate 214.
  • the floating mechanism 211 is an X, Y, Z three-way floating mechanism, so that the liquid interface first end 210 can float in three directions with respect to the vehicle body connecting bracket 13.
  • the floating mechanisms 211 may be disposed at four corners of the vehicle body end floating plate 214, respectively.
  • the pressure sensor 212 can perform a quick change joint connection status indication.
  • FIG. 6 is a second end 220 of the liquid interface of the liquid interface 200 of the connector assembly of FIG. 1.
  • the second end 220 of the liquid interface exemplarily includes a battery pack end stop valve 221 of the liquid interface 200 and a convenient liquid interface first.
  • the end 210 and the second end 220 of the liquid interface are fitted with a guide 222.
  • the top end of the guide member 222 may be tapered to be adapted to be inserted into a corresponding through hole in the floating plate 214 of the first end 210 of the liquid interface to facilitate automatic guiding and deviation correction of the connector assembly.
  • the vehicle body end shutoff valve 213 and the battery pack end shutoff valve 221 are turned on to allow the cooling water passage to circulate.
  • the shutoff valve 213 and the shutoff valve 221 automatically shut off the coolant flow to prevent the coolant from flowing out. Since the shape of the end portions of the shutoff valves 221 and 213 is a planar shape, the coolant does not substantially remain.
  • the liquid-cooled battery pack of the conventional charging mode does not have the above functions.
  • Figure 7 is an exploded view of the floating mechanism at the second end of the liquid interface of Figure 5.
  • the floating mechanism 211 includes a bolt 2111, a nut 2112, a spring 2113, a horizontal slider 215, a horizontal floating elastic body 2115, and a vehicle body floating mounting plate 214.
  • a through hole is disposed in the floating mounting plate 214, and the horizontal floating elastic body 2115 is located in the through hole.
  • the horizontal slider 215 includes two integrally formed flaps 2114, 2116 and a connecting portion connected between the two flaps, the connecting portion passes through the horizontal floating elastic body 2115, and the two blocking pieces 2114, 2116 respectively cover the through hole Both ends.
  • the bolt 2111 passes through the horizontal floating block 215 to pass through the horizontal floating elastic body 2115, and can realize horizontal floating at any angle in the through hole of the floating plate 214 (the movement space is obtained by the deformation of the extruded elastic body 2115, and the through hole and the elastic body are changed. 2115 diameter can adjust the horizontal float amount).
  • the elastic body 2115 may be a columnar rubber body, and a tooth groove may be distributed on the outer peripheral surface thereof to enhance flexibility.
  • the nut 2112 is joined to the threaded end of the bolt 2111.
  • the spring 2113 is sleeved on the bolt 2111, and one end thereof abuts against the horizontal floating block 214 to achieve Z-direction fixing; the other end is fixed against the nut 2112, the nut 2112 is assembled with the bracket 13, and the floating plate 214 and the shut-off valve 213 can be in the Z Float along the bolt 2111.
  • the floating mechanism arrangement in the electrical interface 100 can equally be used with the liquid interface 200; the floating mechanism arrangement in the liquid interface 200 can equally be used for the electrical interface 100.
  • the connector assembly of the present invention can be applied to any device having both electrical and liquid connections.
  • the connector assembly of the present invention can be applied to an electric vehicle; for example, the connector assembly can be used between an undercarriage of an electric vehicle and a power battery pack.
  • the first component 10 can be the chassis of the electric vehicle
  • the second component 20 can be the power battery package of the electric vehicle. Battery pack housing.
  • the connector assembly can be secured to the chassis or battery pack housing by mounting brackets. In conjunction with the detailed description above with respect to Figure 1, the manner in which the connector assembly is mounted on the electric vehicle can be more clearly understood.
  • the battery pack is integrated with the high and low voltage electrical connectors of the vehicle body, collectively referred to as the power quick change connector, which can have automatic correction deviation (with X, Y, Z direction floating), guiding mechanism, IP67, high voltage protection Finger touch, high voltage interlock HVIL function.
  • the liquid-cooled quick-change joints are respectively fixed on the mounting plate, and have a shut-off valve function in both directions (the coolant will not overflow and leak after the joint is disconnected), with self-correction deviation (with X, Y, Z-direction float) And steering mechanism, IP67, zero leakage and prevent air from entering the cooling system.
  • the liquid-cooled battery pack cooling water circuit and the high-low voltage power supply quick-change connector are designed to be installed on the same battery pack cover plate to realize synchronous action; and the power quick-change connector is respectively disposed on the cover. Hydroelectric isolation is achieved on the left and right sides of the board.
  • the water and electricity quick-change connectors all support quick insertion and removal, which can realize full automatic and quick replacement of the battery pack without manual unlocking.
  • the floating and guiding mechanism supports quick-change connector for blind insertion and automatic correction of deviation, which can ensure reliable contact of the connector and absorb the relative vibration and assembly tolerance generated by the battery pack and the body.
  • a sealing ring is installed between the quick-change connector and the battery pack cover to achieve IP67 sealing, which ensures that the inside of the battery pack is isolated from the outside air and water.
  • the liquid-cooled quick-change connector has a sensor status indication function, which can be used to indicate whether the quick-change connector is connected or not.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)

Abstract

L'invention concerne un ensemble connecteur et un système de connexion de batterie le comprenant. L'ensemble connecteur comprend une interface électrique (100) et une interface liquide (200), l'interface électrique (100) comprenant une première extrémité (110) de l'interface électrique et une seconde extrémité (120) de l'interface électrique adaptées l'une à l'autre ; l'interface liquide (200) comprend une première extrémité (210) de l'interface liquide et une seconde extrémité (220) de l'interface liquide adaptées l'une à l'autre ; et la première extrémité (210) de l'interface liquide ainsi que la seconde extrémité (220) de l'interface liquide sont toutes deux pourvues d'une soupape de coupure (221). De plus, la première extrémité (110) de l'interface électrique ainsi que la première extrémité (210) de l'interface liquide sont fixées à un premier composant (10), et la seconde extrémité (120) de l'interface électrique ainsi que la seconde extrémité (220) de l'interface liquide sont fixées à un second composant (20).
PCT/CN2018/073349 2017-01-24 2018-01-19 Ensemble connecteur et système de connexion de batterie le comprenant WO2018137557A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201720093016.0 2017-01-24
CN201720093016.0U CN206585092U (zh) 2017-01-24 2017-01-24 连接器组件及包括其的电池连接系统

Publications (1)

Publication Number Publication Date
WO2018137557A1 true WO2018137557A1 (fr) 2018-08-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/073349 WO2018137557A1 (fr) 2017-01-24 2018-01-19 Ensemble connecteur et système de connexion de batterie le comprenant

Country Status (3)

Country Link
CN (1) CN206585092U (fr)
TW (1) TWM563691U (fr)
WO (1) WO2018137557A1 (fr)

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CN111740279A (zh) * 2020-07-20 2020-10-02 上海奥威科技开发有限公司 一种用于对接连接器的位姿补偿装置及连接器总成
CN112498278B (zh) * 2020-11-24 2022-07-05 上海能辉科技股份有限公司 一种防错式重卡电池与电插头对接系统
CN113193427A (zh) * 2021-04-30 2021-07-30 中航光电科技股份有限公司 一种连接器
CN115189177A (zh) * 2021-06-15 2022-10-14 上海班狄电子科技有限公司 一种集成电路连接与水路连接的换电连接器
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CN116981876A (zh) * 2022-01-14 2023-10-31 宁德时代新能源科技股份有限公司 用于水冷管路的连接器、电池及用电设备
CN115241559A (zh) * 2022-06-06 2022-10-25 东风汽车集团股份有限公司 换电电池包液冷系统、液冷换电电池包更换方法及汽车
CN218677782U (zh) * 2022-08-05 2023-03-21 华为技术有限公司 一种盲插接头及液冷装置
CN116073168B (zh) * 2023-04-06 2023-08-22 四川工程职业技术学院 一种动力电池快换连接器及其电动汽车

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